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方法返回这个数字在特定语言环境下的表示字符串。",[189,196,197,198],{},"语法：",[192,199,200],{},"numObj.toLocaleString([locales [, options]])",[202,203,208],"pre",{"className":204,"code":205,"language":206,"meta":207,"style":207},"language-js shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","let number = 123456789;\nnumber.toLocaleString(); \u002F\u002F 123,456,789\n\nnumber = 12345.6784;\nnumber.toLocaleString(); \u002F\u002F 12,345.678\n\nnumber = 12345.6785;\nnumber.toLocaleString(); \u002F\u002F 12,345.679\n\n\u002F\u002F nu 扩展字段要求编号系统，e.g. 中文十进制\nnumber.toLocaleString(\"zh-Hans-CN-u-nu-hanidec\"); \u002F\u002F 一二三,四五六.六七九\n","js","",[192,209,210,234,257,264,277,293,298,310,326,331,337],{"__ignoreMap":207},[211,212,215,219,223,227,231],"span",{"class":213,"line":214},"line",1,[211,216,218],{"class":217},"spNyl","let",[211,220,222],{"class":221},"sTEyZ"," number ",[211,224,226],{"class":225},"sMK4o","=",[211,228,230],{"class":229},"sbssI"," 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12,345.678\n",[211,294,296],{"class":213,"line":295},6,[211,297,263],{"emptyLinePlaceholder":262},[211,299,301,303,305,308],{"class":213,"line":300},7,[211,302,269],{"class":221},[211,304,226],{"class":225},[211,306,307],{"class":229}," 12345.6785",[211,309,233],{"class":225},[211,311,313,315,317,319,321,323],{"class":213,"line":312},8,[211,314,239],{"class":221},[211,316,242],{"class":225},[211,318,246],{"class":245},[211,320,249],{"class":221},[211,322,252],{"class":225},[211,324,325],{"class":255}," \u002F\u002F 12,345.679\n",[211,327,329],{"class":213,"line":328},9,[211,330,263],{"emptyLinePlaceholder":262},[211,332,334],{"class":213,"line":333},10,[211,335,336],{"class":255},"\u002F\u002F nu 扩展字段要求编号系统，e.g. 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3.14159。",[396,406,408],{"id":407},"mathabs","Math.abs()",[179,410,411,413],{},[192,412,408],{},"函数返回给定数字的绝对值。",[202,415,417],{"className":204,"code":416,"language":206,"meta":207,"style":207},"Math.abs(\"-1\"); \u002F\u002F 1\nMath.abs(-2); \u002F\u002F 2\nMath.abs(null); \u002F\u002F 0\nMath.abs(\"string\"); \u002F\u002F NaN\nMath.abs(); \u002F\u002F NaN\n",[192,418,419,444,467,487,511],{"__ignoreMap":207},[211,420,421,423,425,428,430,432,435,437,439,441],{"class":213,"line":214},[211,422,390],{"class":221},[211,424,242],{"class":225},[211,426,427],{"class":245},"abs",[211,429,348],{"class":221},[211,431,351],{"class":225},[211,433,434],{"class":354},"-1",[211,436,351],{"class":225},[211,438,360],{"class":221},[211,440,252],{"class":225},[211,442,443],{"class":255}," \u002F\u002F 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1\n",[192,542,543,563,582,603],{"__ignoreMap":207},[211,544,545,547,549,552,554,557,559,561],{"class":213,"line":214},[211,546,390],{"class":221},[211,548,242],{"class":225},[211,550,551],{"class":245},"ceil",[211,553,348],{"class":221},[211,555,556],{"class":229},"0.95",[211,558,360],{"class":221},[211,560,252],{"class":225},[211,562,443],{"class":255},[211,564,565,567,569,571,573,576,578,580],{"class":213,"line":236},[211,566,390],{"class":221},[211,568,242],{"class":225},[211,570,551],{"class":245},[211,572,348],{"class":221},[211,574,575],{"class":229},"1.05",[211,577,360],{"class":221},[211,579,252],{"class":225},[211,581,466],{"class":255},[211,583,584,586,588,590,592,594,596,598,600],{"class":213,"line":259},[211,585,390],{"class":221},[211,587,242],{"class":225},[211,589,551],{"class":245},[211,591,348],{"class":221},[211,593,456],{"class":225},[211,595,575],{"class":229},[211,597,360],{"class":221},[211,599,252],{"class":225},[211,601,602],{"class":255}," \u002F\u002F 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-46\n",[192,638,639,660,679,698,719],{"__ignoreMap":207},[211,640,641,643,645,648,650,653,655,657],{"class":213,"line":214},[211,642,390],{"class":221},[211,644,242],{"class":225},[211,646,647],{"class":245},"floor",[211,649,348],{"class":221},[211,651,652],{"class":229},"45.95",[211,654,360],{"class":221},[211,656,252],{"class":225},[211,658,659],{"class":255}," \u002F\u002F 45\n",[211,661,662,664,666,668,670,673,675,677],{"class":213,"line":236},[211,663,390],{"class":221},[211,665,242],{"class":225},[211,667,647],{"class":245},[211,669,348],{"class":221},[211,671,672],{"class":229},"45.05",[211,674,360],{"class":221},[211,676,252],{"class":225},[211,678,659],{"class":255},[211,680,681,683,685,687,689,692,694,696],{"class":213,"line":259},[211,682,390],{"class":221},[211,684,242],{"class":225},[211,686,647],{"class":245},[211,688,348],{"class":221},[211,690,691],{"class":229},"45",[211,693,360],{"class":221},[211,695,252],{"class":225},[211,697,659],{"class":255},[211,699,700,702,704,706,708,710,712,714,716],{"class":213,"line":266},[211,701,390],{"class":221},[211,703,242],{"class":225},[211,705,647],{"class":245},[211,707,348],{"class":221},[211,709,456],{"class":225},[211,711,672],{"class":229},[211,713,360],{"class":221},[211,715,252],{"class":225},[211,717,718],{"class":255}," \u002F\u002F -46\n",[211,720,721,723,725,727,729,731,733,735,737],{"class":213,"line":279},[211,722,390],{"class":221},[211,724,242],{"class":225},[211,726,647],{"class":245},[211,728,348],{"class":221},[211,730,456],{"class":225},[211,732,652],{"class":229},[211,734,360],{"class":221},[211,736,252],{"class":225},[211,738,718],{"class":255},[396,740,742],{"id":741},"mathmax","Math.max()",[179,744,745,747,748,751,752,537],{},[192,746,742],{},"函数返回一组数中的最大值。如果给定的参数中至少有一个参数无法被转换成数字，则会返回",[192,749,750],{},"NaN","。如果没有参数，则结果为 ",[192,753,754],{},"-Infinity",[202,756,758],{"className":204,"code":757,"language":206,"meta":207,"style":207},"Math.max(); \u002F\u002F -Infinity\nMath.max(3, -1, 1, 2, 3, 4, 5); \u002F\u002F 5\nMath.max(3, -1, 1, 2, 3, 4, 5, \"\", false); \u002F\u002F 5\nMath.max(3, -1, 1, 2, 3, 4, 5, \"\", false, undefined); \u002F\u002F NaN\n\nconst arr = [3, -1, 1, 2, 3, 4, 5];\nMath.max.apply(null, arr); \u002F\u002F 5\nMath.max(...arr); \u002F\u002F 5\n",[192,759,760,776,829,884,941,945,991,1016],{"__ignoreMap":207},[211,761,762,764,766,769,771,773],{"class":213,"line":214},[211,763,390],{"class":221},[211,765,242],{"class":225},[211,767,768],{"class":245},"max",[211,770,249],{"class":221},[211,772,252],{"class":225},[211,774,775],{"class":255}," \u002F\u002F -Infinity\n",[211,777,778,780,782,784,786,789,792,795,797,799,802,804,807,809,812,814,817,819,822,824,826],{"class":213,"line":236},[211,779,390],{"class":221},[211,781,242],{"class":225},[211,783,768],{"class":245},[211,785,348],{"class":221},[211,787,788],{"class":229},"3",[211,790,791],{"class":225},",",[211,793,794],{"class":225}," -",[211,796,615],{"class":229},[211,798,791],{"class":225},[211,800,801],{"class":229}," 1",[211,803,791],{"class":225},[211,805,806],{"class":229}," 2",[211,808,791],{"class":225},[211,810,811],{"class":229}," 3",[211,813,791],{"class":225},[211,815,816],{"class":229}," 4",[211,818,791],{"class":225},[211,820,821],{"class":229}," 5",[211,823,360],{"class":221},[211,825,252],{"class":225},[211,827,828],{"class":255}," \u002F\u002F 5\n",[211,830,831,833,835,837,839,841,843,845,847,849,851,853,855,857,859,861,863,865,867,869,872,874,878,880,882],{"class":213,"line":259},[211,832,390],{"class":221},[211,834,242],{"class":225},[211,836,768],{"class":245},[211,838,348],{"class":221},[211,840,788],{"class":229},[211,842,791],{"class":225},[211,844,794],{"class":225},[211,846,615],{"class":229},[211,848,791],{"class":225},[211,850,801],{"class":229},[211,852,791],{"class":225},[211,854,806],{"class":229},[211,856,791],{"class":225},[211,858,811],{"class":229},[211,860,791],{"class":225},[211,862,816],{"class":229},[211,864,791],{"class":225},[211,866,821],{"class":229},[211,868,791],{"class":225},[211,870,871],{"class":225}," \"\"",[211,873,791],{"class":225},[211,875,877],{"class":876},"sfNiH"," false",[211,879,360],{"class":221},[211,881,252],{"class":225},[211,883,828],{"class":255},[211,885,886,888,890,892,894,896,898,900,902,904,906,908,910,912,914,916,918,920,922,924,926,928,930,932,935,937,939],{"class":213,"line":266},[211,887,390],{"class":221},[211,889,242],{"class":225},[211,891,768],{"class":245},[211,893,348],{"class":221},[211,895,788],{"class":229},[211,897,791],{"class":225},[211,899,794],{"class":225},[211,901,615],{"class":229},[211,903,791],{"class":225},[211,905,801],{"class":229},[211,907,791],{"class":225},[211,909,806],{"class":229},[211,911,791],{"class":225},[211,913,811],{"class":229},[211,915,791],{"class":225},[211,917,816],{"class":229},[211,919,791],{"class":225},[211,921,821],{"class":229},[211,923,791],{"class":225},[211,925,871],{"class":225},[211,927,791],{"class":225},[211,929,877],{"class":876},[211,931,791],{"class":225},[211,933,934],{"class":225}," undefined",[211,936,360],{"class":221},[211,938,252],{"class":225},[211,940,510],{"class":255},[211,942,943],{"class":213,"line":279},[211,944,263],{"emptyLinePlaceholder":262},[211,946,947,950,953,955,958,960,962,964,966,968,970,972,974,976,978,980,982,984,986,989],{"class":213,"line":295},[211,948,949],{"class":217},"const",[211,951,952],{"class":221}," arr ",[211,954,226],{"class":225},[211,956,957],{"class":221}," [",[211,959,788],{"class":229},[211,961,791],{"class":225},[211,963,794],{"class":225},[211,965,615],{"class":229},[211,967,791],{"class":225},[211,969,801],{"class":229},[211,971,791],{"class":225},[211,973,806],{"class":229},[211,975,791],{"class":225},[211,977,811],{"class":229},[211,979,791],{"class":225},[211,981,816],{"class":229},[211,983,791],{"class":225},[211,985,821],{"class":229},[211,987,988],{"class":221},"]",[211,990,233],{"class":225},[211,992,993,995,997,999,1001,1004,1006,1009,1012,1014],{"class":213,"line":300},[211,994,390],{"class":221},[211,996,242],{"class":225},[211,998,768],{"class":221},[211,1000,242],{"class":225},[211,1002,1003],{"class":245},"apply",[211,1005,348],{"class":221},[211,1007,1008],{"class":225},"null,",[211,1010,1011],{"class":221}," arr)",[211,1013,252],{"class":225},[211,1015,828],{"class":255},[211,1017,1018,1020,1022,1024,1026,1029,1032,1034],{"class":213,"line":312},[211,1019,390],{"class":221},[211,1021,242],{"class":225},[211,1023,768],{"class":245},[211,1025,348],{"class":221},[211,1027,1028],{"class":225},"...",[211,1030,1031],{"class":221},"arr)",[211,1033,252],{"class":225},[211,1035,828],{"class":255},[179,1037,1038,1041,1042,1044,1045,537],{},[192,1039,1040],{},"Math.min()","函数返回一组数中的最小值。如果给定的参数中至少有一个参数无法被转换成数字，则会返回",[192,1043,750],{},"。如果没有参数，结果为 ",[192,1046,1047],{},"Infinity",[202,1049,1051],{"className":204,"code":1050,"language":206,"meta":207,"style":207},"Math.min(); \u002F\u002F Infinity\nMath.min(3, -1, 1, 2, 3, 4, 5); \u002F\u002F -1\nMath.min(3, -1, 1, 2, 3, 4, 5, \"\", false); \u002F\u002F -1\nMath.min(3, -1, 1, 2, 3, 4, 5, \"\", false, undefined); \u002F\u002F NaN\n\nconst arr = [3, -1, 1, 2, 3, 4, 5];\nMath.min.apply(null, arr); \u002F\u002F -1\nMath.min(...arr); \u002F\u002F -1\n",[192,1052,1053,1069,1113,1165,1221,1225,1267,1289],{"__ignoreMap":207},[211,1054,1055,1057,1059,1062,1064,1066],{"class":213,"line":214},[211,1056,390],{"class":221},[211,1058,242],{"class":225},[211,1060,1061],{"class":245},"min",[211,1063,249],{"class":221},[211,1065,252],{"class":225},[211,1067,1068],{"class":255}," \u002F\u002F Infinity\n",[211,1070,1071,1073,1075,1077,1079,1081,1083,1085,1087,1089,1091,1093,1095,1097,1099,1101,1103,1105,1107,1109,1111],{"class":213,"line":236},[211,1072,390],{"class":221},[211,1074,242],{"class":225},[211,1076,1061],{"class":245},[211,1078,348],{"class":221},[211,1080,788],{"class":229},[211,1082,791],{"class":225},[211,1084,794],{"class":225},[211,1086,615],{"class":229},[211,1088,791],{"class":225},[211,1090,801],{"class":229},[211,1092,791],{"class":225},[211,1094,806],{"class":229},[211,1096,791],{"class":225},[211,1098,811],{"class":229},[211,1100,791],{"class":225},[211,1102,816],{"class":229},[211,1104,791],{"class":225},[211,1106,821],{"class":229},[211,1108,360],{"class":221},[211,1110,252],{"class":225},[211,1112,602],{"class":255},[211,1114,1115,1117,1119,1121,1123,1125,1127,1129,1131,1133,1135,1137,1139,1141,1143,1145,1147,1149,1151,1153,1155,1157,1159,1161,1163],{"class":213,"line":259},[211,1116,390],{"class":221},[211,1118,242],{"class":225},[211,1120,1061],{"class":245},[211,1122,348],{"class":221},[211,1124,788],{"class":229},[211,1126,791],{"class":225},[211,1128,794],{"class":225},[211,1130,615],{"class":229},[211,1132,791],{"class":225},[211,1134,801],{"class":229},[211,1136,791],{"class":225},[211,1138,806],{"class":229},[211,1140,791],{"class":225},[211,1142,811],{"class":229},[211,1144,791],{"class":225},[211,1146,816],{"class":229},[211,1148,791],{"class":225},[211,1150,821],{"class":229},[211,1152,791],{"class":225},[211,1154,871],{"class":225},[211,1156,791],{"class":225},[211,1158,877],{"class":876},[211,1160,360],{"class":221},[211,1162,252],{"class":225},[211,1164,602],{"class":255},[211,1166,1167,1169,1171,1173,1175,1177,1179,1181,1183,1185,1187,1189,1191,1193,1195,1197,1199,1201,1203,1205,1207,1209,1211,1213,1215,1217,1219],{"class":213,"line":266},[211,1168,390],{"class":221},[211,1170,242],{"class":225},[211,1172,1061],{"class":245},[211,1174,348],{"class":221},[211,1176,788],{"class":229},[211,1178,791],{"class":225},[211,1180,794],{"class":225},[211,1182,615],{"class":229},[211,1184,791],{"class":225},[211,1186,801],{"class":229},[211,1188,791],{"class":225},[211,1190,806],{"class":229},[211,1192,791],{"class":225},[211,1194,811],{"class":229},[211,1196,791],{"class":225},[211,1198,816],{"class":229},[211,1200,791],{"class":225},[211,1202,821],{"class":229},[211,1204,791],{"class":225},[211,1206,871],{"class":225},[211,1208,791],{"class":225},[211,1210,877],{"class":876},[211,1212,791],{"class":225},[211,1214,934],{"class":225},[211,1216,360],{"class":221},[211,1218,252],{"class":225},[211,1220,510],{"class":255},[211,1222,1223],{"class":213,"line":279},[211,1224,263],{"emptyLinePlaceholder":262},[211,1226,1227,1229,1231,1233,1235,1237,1239,1241,1243,1245,1247,1249,1251,1253,1255,1257,1259,1261,1263,1265],{"class":213,"line":295},[211,1228,949],{"class":217},[211,1230,952],{"class":221},[211,1232,226],{"class":225},[211,1234,957],{"class":221},[211,1236,788],{"class":229},[211,1238,791],{"class":225},[211,1240,794],{"class":225},[211,1242,615],{"class":229},[211,1244,791],{"class":225},[211,1246,801],{"class":229},[211,1248,791],{"class":225},[211,1250,806],{"class":229},[211,1252,791],{"class":225},[211,1254,811],{"class":229},[211,1256,791],{"class":225},[211,1258,816],{"class":229},[211,1260,791],{"class":225},[211,1262,821],{"class":229},[211,1264,988],{"class":221},[211,1266,233],{"class":225},[211,1268,1269,1271,1273,1275,1277,1279,1281,1283,1285,1287],{"class":213,"line":300},[211,1270,390],{"class":221},[211,1272,242],{"class":225},[211,1274,1061],{"class":221},[211,1276,242],{"class":225},[211,1278,1003],{"class":245},[211,1280,348],{"class":221},[211,1282,1008],{"class":225},[211,1284,1011],{"class":221},[211,1286,252],{"class":225},[211,1288,602],{"class":255},[211,1290,1291,1293,1295,1297,1299,1301,1303,1305],{"class":213,"line":312},[211,1292,390],{"class":221},[211,1294,242],{"class":225},[211,1296,1061],{"class":245},[211,1298,348],{"class":221},[211,1300,1028],{"class":225},[211,1302,1031],{"class":221},[211,1304,252],{"class":225},[211,1306,602],{"class":255},[396,1308,1310],{"id":1309},"mathpow","Math.pow()",[179,1312,1313,1319],{},[182,1314,1315,1318],{},[192,1316,1317],{},"Math.pow(x, y)","函数返回基数 x 的指数 y 次幂，即 xy。",[182,1320,1321],{},[211,1322,1324,1325,537],{"style":1323},"color:red","等价于 ",[192,1326,1327],{},"x**y",[202,1329,1331],{"className":204,"code":1330,"language":206,"meta":207,"style":207},"Math.pow(2, 10); \u002F\u002F 1024\n2 ** 10; \u002F\u002F 1024\nMath.pow(4, 0.5); \u002F\u002F 2\nMath.pow(4, -0.5); \u002F\u002F 0.5\nMath.pow(-7, 0.5); \u002F\u002F NaN\n",[192,1332,1333,1358,1371,1395,1421],{"__ignoreMap":207},[211,1334,1335,1337,1339,1342,1344,1346,1348,1351,1353,1355],{"class":213,"line":214},[211,1336,390],{"class":221},[211,1338,242],{"class":225},[211,1340,1341],{"class":245},"pow",[211,1343,348],{"class":221},[211,1345,459],{"class":229},[211,1347,791],{"class":225},[211,1349,1350],{"class":229}," 10",[211,1352,360],{"class":221},[211,1354,252],{"class":225},[211,1356,1357],{"class":255}," \u002F\u002F 1024\n",[211,1359,1360,1362,1365,1367,1369],{"class":213,"line":236},[211,1361,459],{"class":229},[211,1363,1364],{"class":225}," **",[211,1366,1350],{"class":229},[211,1368,252],{"class":225},[211,1370,1357],{"class":255},[211,1372,1373,1375,1377,1379,1381,1384,1386,1389,1391,1393],{"class":213,"line":259},[211,1374,390],{"class":221},[211,1376,242],{"class":225},[211,1378,1341],{"class":245},[211,1380,348],{"class":221},[211,1382,1383],{"class":229},"4",[211,1385,791],{"class":225},[211,1387,1388],{"class":229}," 0.5",[211,1390,360],{"class":221},[211,1392,252],{"class":225},[211,1394,466],{"class":255},[211,1396,1397,1399,1401,1403,1405,1407,1409,1411,1414,1416,1418],{"class":213,"line":266},[211,1398,390],{"class":221},[211,1400,242],{"class":225},[211,1402,1341],{"class":245},[211,1404,348],{"class":221},[211,1406,1383],{"class":229},[211,1408,791],{"class":225},[211,1410,794],{"class":225},[211,1412,1413],{"class":229},"0.5",[211,1415,360],{"class":221},[211,1417,252],{"class":225},[211,1419,1420],{"class":255}," \u002F\u002F 0.5\n",[211,1422,1423,1425,1427,1429,1431,1433,1436,1438,1440,1442,1444],{"class":213,"line":279},[211,1424,390],{"class":221},[211,1426,242],{"class":225},[211,1428,1341],{"class":245},[211,1430,348],{"class":221},[211,1432,456],{"class":225},[211,1434,1435],{"class":229},"7",[211,1437,791],{"class":225},[211,1439,1388],{"class":229},[211,1441,360],{"class":221},[211,1443,252],{"class":225},[211,1445,510],{"class":255},[396,1447,1449],{"id":1448},"mathrandom","Math.random()",[179,1451,1452,1454],{},[192,1453,1449],{},"函数返回一个浮点数, 伪随机数在范围从 0 到小于 1，也就是说，从 0（包括 0）往上，但是不包括 1（排除 1），然后您可以缩放到所需的范围。",[202,1456,1458],{"className":204,"code":1457,"language":206,"meta":207,"style":207},"Math.random();\nMath.floor(Math.random() * 3);\n",[192,1459,1460,1473],{"__ignoreMap":207},[211,1461,1462,1464,1466,1469,1471],{"class":213,"line":214},[211,1463,390],{"class":221},[211,1465,242],{"class":225},[211,1467,1468],{"class":245},"random",[211,1470,249],{"class":221},[211,1472,233],{"class":225},[211,1474,1475,1477,1479,1481,1484,1486,1488,1491,1494,1496,1498],{"class":213,"line":236},[211,1476,390],{"class":221},[211,1478,242],{"class":225},[211,1480,647],{"class":245},[211,1482,1483],{"class":221},"(Math",[211,1485,242],{"class":225},[211,1487,1468],{"class":245},[211,1489,1490],{"class":221},"() ",[211,1492,1493],{"class":225},"*",[211,1495,811],{"class":229},[211,1497,360],{"class":221},[211,1499,233],{"class":225},[396,1501,1503],{"id":1502},"mathround","Math.round()",[179,1505,1506,1508],{},[192,1507,1503],{},"函数返回一个数字四舍五入后最接近的整数。",[202,1510,1512],{"className":204,"code":1511,"language":206,"meta":207,"style":207},"Math.round(20.49); \u002F\u002F 20\nMath.round(20.5); \u002F\u002F 21\nMath.round(-20.5); \u002F\u002F -20\nMath.round(-20.51); \u002F\u002F -21\nMath.round(-20.49); \u002F\u002F -20\n",[192,1513,1514,1535,1555,1576,1598],{"__ignoreMap":207},[211,1515,1516,1518,1520,1523,1525,1528,1530,1532],{"class":213,"line":214},[211,1517,390],{"class":221},[211,1519,242],{"class":225},[211,1521,1522],{"class":245},"round",[211,1524,348],{"class":221},[211,1526,1527],{"class":229},"20.49",[211,1529,360],{"class":221},[211,1531,252],{"class":225},[211,1533,1534],{"class":255}," \u002F\u002F 20\n",[211,1536,1537,1539,1541,1543,1545,1548,1550,1552],{"class":213,"line":236},[211,1538,390],{"class":221},[211,1540,242],{"class":225},[211,1542,1522],{"class":245},[211,1544,348],{"class":221},[211,1546,1547],{"class":229},"20.5",[211,1549,360],{"class":221},[211,1551,252],{"class":225},[211,1553,1554],{"class":255}," \u002F\u002F 21\n",[211,1556,1557,1559,1561,1563,1565,1567,1569,1571,1573],{"class":213,"line":259},[211,1558,390],{"class":221},[211,1560,242],{"class":225},[211,1562,1522],{"class":245},[211,1564,348],{"class":221},[211,1566,456],{"class":225},[211,1568,1547],{"class":229},[211,1570,360],{"class":221},[211,1572,252],{"class":225},[211,1574,1575],{"class":255}," \u002F\u002F -20\n",[211,1577,1578,1580,1582,1584,1586,1588,1591,1593,1595],{"class":213,"line":266},[211,1579,390],{"class":221},[211,1581,242],{"class":225},[211,1583,1522],{"class":245},[211,1585,348],{"class":221},[211,1587,456],{"class":225},[211,1589,1590],{"class":229},"20.51",[211,1592,360],{"class":221},[211,1594,252],{"class":225},[211,1596,1597],{"class":255}," \u002F\u002F -21\n",[211,1599,1600,1602,1604,1606,1608,1610,1612,1614,1616],{"class":213,"line":279},[211,1601,390],{"class":221},[211,1603,242],{"class":225},[211,1605,1522],{"class":245},[211,1607,348],{"class":221},[211,1609,456],{"class":225},[211,1611,1527],{"class":229},[211,1613,360],{"class":221},[211,1615,252],{"class":225},[211,1617,1575],{"class":255},[396,1619,1621],{"id":1620},"mathsqrt","Math.sqrt()",[179,1623,1624,1626,1627,537],{},[192,1625,1621],{},"函数返回一个数的平方根。y^2 = x。如果参数 number 为负值，则返回 ",[192,1628,750],{},[202,1630,1632],{"className":204,"code":1631,"language":206,"meta":207,"style":207},"Math.sqrt(9); \u002F\u002F 3\nMath.sqrt(2); \u002F\u002F 1.414213562373095\nMath.sqrt(1); \u002F\u002F 1\nMath.sqrt(0); \u002F\u002F 0\nMath.sqrt(-1); \u002F\u002F NaN\nMath.sqrt(-0); \u002F\u002F -0\n",[192,1633,1634,1655,1674,1692,1711,1731],{"__ignoreMap":207},[211,1635,1636,1638,1640,1643,1645,1648,1650,1652],{"class":213,"line":214},[211,1637,390],{"class":221},[211,1639,242],{"class":225},[211,1641,1642],{"class":245},"sqrt",[211,1644,348],{"class":221},[211,1646,1647],{"class":229},"9",[211,1649,360],{"class":221},[211,1651,252],{"class":225},[211,1653,1654],{"class":255}," \u002F\u002F 3\n",[211,1656,1657,1659,1661,1663,1665,1667,1669,1671],{"class":213,"line":236},[211,1658,390],{"class":221},[211,1660,242],{"class":225},[211,1662,1642],{"class":245},[211,1664,348],{"class":221},[211,1666,459],{"class":229},[211,1668,360],{"class":221},[211,1670,252],{"class":225},[211,1672,1673],{"class":255}," \u002F\u002F 1.414213562373095\n",[211,1675,1676,1678,1680,1682,1684,1686,1688,1690],{"class":213,"line":259},[211,1677,390],{"class":221},[211,1679,242],{"class":225},[211,1681,1642],{"class":245},[211,1683,348],{"class":221},[211,1685,615],{"class":229},[211,1687,360],{"class":221},[211,1689,252],{"class":225},[211,1691,443],{"class":255},[211,1693,1694,1696,1698,1700,1702,1705,1707,1709],{"class":213,"line":266},[211,1695,390],{"class":221},[211,1697,242],{"class":225},[211,1699,1642],{"class":245},[211,1701,348],{"class":221},[211,1703,1704],{"class":229},"0",[211,1706,360],{"class":221},[211,1708,252],{"class":225},[211,1710,486],{"class":255},[211,1712,1713,1715,1717,1719,1721,1723,1725,1727,1729],{"class":213,"line":279},[211,1714,390],{"class":221},[211,1716,242],{"class":225},[211,1718,1642],{"class":245},[211,1720,348],{"class":221},[211,1722,456],{"class":225},[211,1724,615],{"class":229},[211,1726,360],{"class":221},[211,1728,252],{"class":225},[211,1730,510],{"class":255},[211,1732,1733,1735,1737,1739,1741,1743,1745,1747,1749],{"class":213,"line":295},[211,1734,390],{"class":221},[211,1736,242],{"class":225},[211,1738,1642],{"class":245},[211,1740,348],{"class":221},[211,1742,456],{"class":225},[211,1744,1704],{"class":229},[211,1746,360],{"class":221},[211,1748,252],{"class":225},[211,1750,1751],{"class":255}," \u002F\u002F -0\n",[396,1753,1755],{"id":1754},"mathtrunc","Math.trunc()",[179,1757,1758,1761],{},[182,1759,1760],{},"注意",[186,1762,1763,1768],{},[189,1764,1765,1767],{},[192,1766,1755],{},"函数会将数字的小数部分去掉，只保留整数部分。等价于 ~~（无 +0、-0 区分）。",[189,1769,1770,1772],{},[192,1771,1755],{},"的执行逻辑很简单，仅仅是删除掉数字的小数部分和小数点，不管参数是正数还是负数。传入该方法的参数会被隐式转换成数字类型。",[202,1774,1776],{"className":204,"code":1775,"language":206,"meta":207,"style":207},"Math.trunc(13.37); \u002F\u002F 13\nMath.trunc(42.84); \u002F\u002F 42\nMath.trunc(0.123); \u002F\u002F 0\nMath.trunc(-0.123); \u002F\u002F -0\nMath.trunc(\"-1.123\"); \u002F\u002F -1\nMath.trunc(Number.NaN); \u002F\u002F NaN\nMath.trunc(\"foo\"); \u002F\u002F NaN\nMath.trunc(); \u002F\u002F NaN\n\n~~-0.95; \u002F\u002F 0\n~~0.95; \u002F\u002F 0\n~~-1.05; \u002F\u002F -1\n~~-1.95; \u002F\u002F -1\n~~45.95; \u002F\u002F 45\n~~45.05; \u002F\u002F 45\n",[192,1777,1778,1799,1819,1839,1859,1882,1902,1925,1939,1943,1954,1965,1976,1988,1999],{"__ignoreMap":207},[211,1779,1780,1782,1784,1787,1789,1792,1794,1796],{"class":213,"line":214},[211,1781,390],{"class":221},[211,1783,242],{"class":225},[211,1785,1786],{"class":245},"trunc",[211,1788,348],{"class":221},[211,1790,1791],{"class":229},"13.37",[211,1793,360],{"class":221},[211,1795,252],{"class":225},[211,1797,1798],{"class":255}," \u002F\u002F 13\n",[211,1800,1801,1803,1805,1807,1809,1812,1814,1816],{"class":213,"line":236},[211,1802,390],{"class":221},[211,1804,242],{"class":225},[211,1806,1786],{"class":245},[211,1808,348],{"class":221},[211,1810,1811],{"class":229},"42.84",[211,1813,360],{"class":221},[211,1815,252],{"class":225},[211,1817,1818],{"class":255}," \u002F\u002F 42\n",[211,1820,1821,1823,1825,1827,1829,1832,1834,1836],{"class":213,"line":259},[211,1822,390],{"class":221},[211,1824,242],{"class":225},[211,1826,1786],{"class":245},[211,1828,348],{"class":221},[211,1830,1831],{"class":229},"0.123",[211,1833,360],{"class":221},[211,1835,252],{"class":225},[211,1837,1838],{"class":255}," \u002F\u002F 0\n",[211,1840,1841,1843,1845,1847,1849,1851,1853,1855,1857],{"class":213,"line":266},[211,1842,390],{"class":221},[211,1844,242],{"class":225},[211,1846,1786],{"class":245},[211,1848,348],{"class":221},[211,1850,456],{"class":225},[211,1852,1831],{"class":229},[211,1854,360],{"class":221},[211,1856,252],{"class":225},[211,1858,1751],{"class":255},[211,1860,1861,1863,1865,1867,1869,1871,1874,1876,1878,1880],{"class":213,"line":279},[211,1862,390],{"class":221},[211,1864,242],{"class":225},[211,1866,1786],{"class":245},[211,1868,348],{"class":221},[211,1870,351],{"class":225},[211,1872,1873],{"class":354},"-1.123",[211,1875,351],{"class":225},[211,1877,360],{"class":221},[211,1879,252],{"class":225},[211,1881,602],{"class":255},[211,1883,1884,1886,1888,1890,1893,1895,1898,1900],{"class":213,"line":295},[211,1885,390],{"class":221},[211,1887,242],{"class":225},[211,1889,1786],{"class":245},[211,1891,1892],{"class":221},"(Number",[211,1894,242],{"class":225},[211,1896,1897],{"class":221},"NaN)",[211,1899,252],{"class":225},[211,1901,510],{"class":255},[211,1903,1904,1906,1908,1910,1912,1914,1917,1919,1921,1923],{"class":213,"line":300},[211,1905,390],{"class":221},[211,1907,242],{"class":225},[211,1909,1786],{"class":245},[211,1911,348],{"class":221},[211,1913,351],{"class":225},[211,1915,1916],{"class":354},"foo",[211,1918,351],{"class":225},[211,1920,360],{"class":221},[211,1922,252],{"class":225},[211,1924,510],{"class":255},[211,1926,1927,1929,1931,1933,1935,1937],{"class":213,"line":312},[211,1928,390],{"class":221},[211,1930,242],{"class":225},[211,1932,1786],{"class":245},[211,1934,249],{"class":221},[211,1936,252],{"class":225},[211,1938,510],{"class":255},[211,1940,1941],{"class":213,"line":328},[211,1942,263],{"emptyLinePlaceholder":262},[211,1944,1945,1948,1950,1952],{"class":213,"line":333},[211,1946,1947],{"class":225},"~~-",[211,1949,556],{"class":229},[211,1951,252],{"class":225},[211,1953,486],{"class":255},[211,1955,1956,1959,1961,1963],{"class":213,"line":339},[211,1957,1958],{"class":225},"~~",[211,1960,556],{"class":229},[211,1962,252],{"class":225},[211,1964,486],{"class":255},[211,1966,1968,1970,1972,1974],{"class":213,"line":1967},12,[211,1969,1947],{"class":225},[211,1971,575],{"class":229},[211,1973,252],{"class":225},[211,1975,602],{"class":255},[211,1977,1979,1981,1984,1986],{"class":213,"line":1978},13,[211,1980,1947],{"class":225},[211,1982,1983],{"class":229},"1.95",[211,1985,252],{"class":225},[211,1987,602],{"class":255},[211,1989,1991,1993,1995,1997],{"class":213,"line":1990},14,[211,1992,1958],{"class":225},[211,1994,652],{"class":229},[211,1996,252],{"class":225},[211,1998,659],{"class":255},[211,2000,2002,2004,2006,2008],{"class":213,"line":2001},15,[211,2003,1958],{"class":225},[211,2005,672],{"class":229},[211,2007,252],{"class":225},[211,2009,659],{"class":255},[367,2011,2012],{},[182,2013,2014],{},[373,2015,2018],{"href":2016,"rel":2017,"target":379},"https:\u002F\u002Fdeveloper.mozilla.org\u002Fzh-CN\u002Fdocs\u002FWeb\u002FJavaScript\u002FReference\u002FGlobal_Objects\u002FMath",[377,378],"MDN - Math",[174,2020,2022],{"id":2021},"object-常用的属性方法","Object 常用的属性方法",[396,2024,2026],{"id":2025},"objectassign","Object.assign()",[179,2028,2029],{},"用于将所有可枚举属性的值从一个或多个源对象分配到目标对象。它将返回目标对象。",[202,2031,2033],{"className":204,"code":2032,"language":206,"meta":207,"style":207},"const o1 = { a: 1 };\nconst o2 = { b: 2 };\nconst o3 = { c: 3 };\n\nconst obj = Object.assign(o1, o2, o3);\nconsole.log(obj); \u002F\u002F { a: 1, b: 2, c: 3 }\nconsole.log(o1); \u002F\u002F { a: 1, b: 2, c: 3 }\n",[192,2034,2035,2059,2079,2099,2103,2135,2153],{"__ignoreMap":207},[211,2036,2037,2039,2042,2044,2047,2051,2054,2056],{"class":213,"line":214},[211,2038,949],{"class":217},[211,2040,2041],{"class":221}," o1 ",[211,2043,226],{"class":225},[211,2045,2046],{"class":225}," {",[211,2048,2050],{"class":2049},"swJcz"," a",[211,2052,2053],{"class":225},":",[211,2055,801],{"class":229},[211,2057,2058],{"class":225}," };\n",[211,2060,2061,2063,2066,2068,2070,2073,2075,2077],{"class":213,"line":236},[211,2062,949],{"class":217},[211,2064,2065],{"class":221}," o2 ",[211,2067,226],{"class":225},[211,2069,2046],{"class":225},[211,2071,2072],{"class":2049}," b",[211,2074,2053],{"class":225},[211,2076,806],{"class":229},[211,2078,2058],{"class":225},[211,2080,2081,2083,2086,2088,2090,2093,2095,2097],{"class":213,"line":259},[211,2082,949],{"class":217},[211,2084,2085],{"class":221}," o3 ",[211,2087,226],{"class":225},[211,2089,2046],{"class":225},[211,2091,2092],{"class":2049}," c",[211,2094,2053],{"class":225},[211,2096,811],{"class":229},[211,2098,2058],{"class":225},[211,2100,2101],{"class":213,"line":266},[211,2102,263],{"emptyLinePlaceholder":262},[211,2104,2105,2107,2110,2112,2115,2117,2120,2123,2125,2128,2130,2133],{"class":213,"line":279},[211,2106,949],{"class":217},[211,2108,2109],{"class":221}," obj ",[211,2111,226],{"class":225},[211,2113,2114],{"class":221}," Object",[211,2116,242],{"class":225},[211,2118,2119],{"class":245},"assign",[211,2121,2122],{"class":221},"(o1",[211,2124,791],{"class":225},[211,2126,2127],{"class":221}," o2",[211,2129,791],{"class":225},[211,2131,2132],{"class":221}," o3)",[211,2134,233],{"class":225},[211,2136,2137,2140,2142,2145,2148,2150],{"class":213,"line":295},[211,2138,2139],{"class":221},"console",[211,2141,242],{"class":225},[211,2143,2144],{"class":245},"log",[211,2146,2147],{"class":221},"(obj)",[211,2149,252],{"class":225},[211,2151,2152],{"class":255}," \u002F\u002F { a: 1, b: 2, c: 3 }\n",[211,2154,2155,2157,2159,2161,2164,2166],{"class":213,"line":300},[211,2156,2139],{"class":221},[211,2158,242],{"class":225},[211,2160,2144],{"class":245},[211,2162,2163],{"class":221},"(o1)",[211,2165,252],{"class":225},[211,2167,2152],{"class":255},[396,2169,2171],{"id":2170},"objectdefineproperty","Object.defineProperty()",[179,2173,2174],{},"直接在一个对象上定义一个新属性，或者修改一个对象的现有属性，并返回此对象。",[202,2176,2178],{"className":204,"code":2177,"language":206,"meta":207,"style":207},"const obj = {}; \u002F\u002F 创建一个新对象\n\n\u002F\u002F 在对象中添加一个属性与数据描述符的示例\nObject.defineProperty(obj, \"a\", {\n value: 37,\n writable: true,\n enumerable: true,\n configurable: true,\n});\n",[192,2179,2180,2194,2198,2203,2230,2243,2255,2266,2277],{"__ignoreMap":207},[211,2181,2182,2184,2186,2188,2191],{"class":213,"line":214},[211,2183,949],{"class":217},[211,2185,2109],{"class":221},[211,2187,226],{"class":225},[211,2189,2190],{"class":225}," {};",[211,2192,2193],{"class":255}," \u002F\u002F 创建一个新对象\n",[211,2195,2196],{"class":213,"line":236},[211,2197,263],{"emptyLinePlaceholder":262},[211,2199,2200],{"class":213,"line":259},[211,2201,2202],{"class":255},"\u002F\u002F 在对象中添加一个属性与数据描述符的示例\n",[211,2204,2205,2208,2210,2213,2216,2218,2221,2223,2225,2227],{"class":213,"line":266},[211,2206,2207],{"class":221},"Object",[211,2209,242],{"class":225},[211,2211,2212],{"class":245},"defineProperty",[211,2214,2215],{"class":221},"(obj",[211,2217,791],{"class":225},[211,2219,2220],{"class":225}," \"",[211,2222,373],{"class":354},[211,2224,351],{"class":225},[211,2226,791],{"class":225},[211,2228,2229],{"class":225}," {\n",[211,2231,2232,2235,2237,2240],{"class":213,"line":279},[211,2233,2234],{"class":2049}," value",[211,2236,2053],{"class":225},[211,2238,2239],{"class":229}," 37",[211,2241,2242],{"class":225},",\n",[211,2244,2245,2248,2250,2253],{"class":213,"line":295},[211,2246,2247],{"class":2049}," writable",[211,2249,2053],{"class":225},[211,2251,2252],{"class":876}," true",[211,2254,2242],{"class":225},[211,2256,2257,2260,2262,2264],{"class":213,"line":300},[211,2258,2259],{"class":2049}," enumerable",[211,2261,2053],{"class":225},[211,2263,2252],{"class":876},[211,2265,2242],{"class":225},[211,2267,2268,2271,2273,2275],{"class":213,"line":312},[211,2269,2270],{"class":2049}," configurable",[211,2272,2053],{"class":225},[211,2274,2252],{"class":876},[211,2276,2242],{"class":225},[211,2278,2279,2282,2284],{"class":213,"line":328},[211,2280,2281],{"class":225},"}",[211,2283,360],{"class":221},[211,2285,233],{"class":225},[396,2287,2289],{"id":2288},"objectdefineproperties","Object.defineProperties()",[179,2291,2292],{},[186,2293,2294,2297],{},[189,2295,2296],{},"直接在一个对象上定义新的属性或修改现有属性，并返回该对象。",[189,2298,2299],{},"该方法与Object.defineProperty相似，只不过该方法可以一次性操作多个属性。",[202,2301,2303],{"className":204,"code":2302,"language":206,"meta":207,"style":207},"const obj = {};\nObject.defineProperties(obj, {\n property1: {\n value: true,\n writable: true,\n },\n property2: {\n value: \"Hello\",\n writable: false,\n },\n});\n\u002F\u002F {property1: true, property2: 'Hello'}\n",[192,2304,2305,2316,2331,2340,2351,2362,2367,2376,2391,2401,2405,2413],{"__ignoreMap":207},[211,2306,2307,2309,2311,2313],{"class":213,"line":214},[211,2308,949],{"class":217},[211,2310,2109],{"class":221},[211,2312,226],{"class":225},[211,2314,2315],{"class":225}," {};\n",[211,2317,2318,2320,2322,2325,2327,2329],{"class":213,"line":236},[211,2319,2207],{"class":221},[211,2321,242],{"class":225},[211,2323,2324],{"class":245},"defineProperties",[211,2326,2215],{"class":221},[211,2328,791],{"class":225},[211,2330,2229],{"class":225},[211,2332,2333,2336,2338],{"class":213,"line":259},[211,2334,2335],{"class":2049}," property1",[211,2337,2053],{"class":225},[211,2339,2229],{"class":225},[211,2341,2342,2345,2347,2349],{"class":213,"line":266},[211,2343,2344],{"class":2049}," value",[211,2346,2053],{"class":225},[211,2348,2252],{"class":876},[211,2350,2242],{"class":225},[211,2352,2353,2356,2358,2360],{"class":213,"line":279},[211,2354,2355],{"class":2049}," writable",[211,2357,2053],{"class":225},[211,2359,2252],{"class":876},[211,2361,2242],{"class":225},[211,2363,2364],{"class":213,"line":295},[211,2365,2366],{"class":225}," },\n",[211,2368,2369,2372,2374],{"class":213,"line":300},[211,2370,2371],{"class":2049}," property2",[211,2373,2053],{"class":225},[211,2375,2229],{"class":225},[211,2377,2378,2380,2382,2384,2387,2389],{"class":213,"line":312},[211,2379,2344],{"class":2049},[211,2381,2053],{"class":225},[211,2383,2220],{"class":225},[211,2385,2386],{"class":354},"Hello",[211,2388,351],{"class":225},[211,2390,2242],{"class":225},[211,2392,2393,2395,2397,2399],{"class":213,"line":328},[211,2394,2355],{"class":2049},[211,2396,2053],{"class":225},[211,2398,877],{"class":876},[211,2400,2242],{"class":225},[211,2402,2403],{"class":213,"line":333},[211,2404,2366],{"class":225},[211,2406,2407,2409,2411],{"class":213,"line":339},[211,2408,2281],{"class":225},[211,2410,360],{"class":221},[211,2412,233],{"class":225},[211,2414,2415],{"class":213,"line":1967},[211,2416,2417],{"class":255},"\u002F\u002F {property1: true, property2: 'Hello'}\n",[396,2419,2421],{"id":2420},"objectcreate","Object.create()",[179,2423,2424,2425,537],{},"创建一个新对象，使用现有的对象来提供新创建的对象的",[2426,2427,2428],"strong",{},"proto",[202,2430,2432],{"className":204,"code":2431,"language":206,"meta":207,"style":207},"let o;\n\u002F\u002F 创建一个原型为null的空对象\no = Object.create(null);\n\no = {};\n\u002F\u002F 以字面量方式创建的空对象就相当于:\no = Object.create(Object.prototype);\n\no = Object.create(Object.prototype, {\n \u002F\u002F foo会成为所创建对象的数据属性\n foo: {\n writable: true,\n configurable: true,\n value: \"hello\",\n },\n \u002F\u002F bar会成为所创建对象的访问器属性\n bar: {\n configurable: false,\n get() {\n return 10;\n },\n set(value) {\n console.log(\"Setting `o.bar` to\", value);\n },\n },\n});\n\u002F\u002F {foo: 'hello'}\n",[192,2433,2434,2443,2448,2470,2474,2482,2487,2511,2515,2540,2545,2554,2564,2575,2590,2594,2600,2610,2621,2631,2642,2648,2664,2692,2697,2702,2711],{"__ignoreMap":207},[211,2435,2436,2438,2441],{"class":213,"line":214},[211,2437,218],{"class":217},[211,2439,2440],{"class":221}," o",[211,2442,233],{"class":225},[211,2444,2445],{"class":213,"line":236},[211,2446,2447],{"class":255},"\u002F\u002F 创建一个原型为null的空对象\n",[211,2449,2450,2453,2455,2457,2459,2462,2464,2466,2468],{"class":213,"line":259},[211,2451,2452],{"class":221},"o ",[211,2454,226],{"class":225},[211,2456,2114],{"class":221},[211,2458,242],{"class":225},[211,2460,2461],{"class":245},"create",[211,2463,348],{"class":221},[211,2465,479],{"class":225},[211,2467,360],{"class":221},[211,2469,233],{"class":225},[211,2471,2472],{"class":213,"line":266},[211,2473,263],{"emptyLinePlaceholder":262},[211,2475,2476,2478,2480],{"class":213,"line":279},[211,2477,2452],{"class":221},[211,2479,226],{"class":225},[211,2481,2315],{"class":225},[211,2483,2484],{"class":213,"line":295},[211,2485,2486],{"class":255},"\u002F\u002F 以字面量方式创建的空对象就相当于:\n",[211,2488,2489,2491,2493,2495,2497,2499,2501,2504,2506,2509],{"class":213,"line":300},[211,2490,2452],{"class":221},[211,2492,226],{"class":225},[211,2494,2114],{"class":221},[211,2496,242],{"class":225},[211,2498,2461],{"class":245},[211,2500,348],{"class":221},[211,2502,2207],{"class":2503},"sBMFI",[211,2505,242],{"class":225},[211,2507,2508],{"class":221},"prototype)",[211,2510,233],{"class":225},[211,2512,2513],{"class":213,"line":312},[211,2514,263],{"emptyLinePlaceholder":262},[211,2516,2517,2519,2521,2523,2525,2527,2529,2531,2533,2536,2538],{"class":213,"line":328},[211,2518,2452],{"class":221},[211,2520,226],{"class":225},[211,2522,2114],{"class":221},[211,2524,242],{"class":225},[211,2526,2461],{"class":245},[211,2528,348],{"class":221},[211,2530,2207],{"class":2503},[211,2532,242],{"class":225},[211,2534,2535],{"class":221},"prototype",[211,2537,791],{"class":225},[211,2539,2229],{"class":225},[211,2541,2542],{"class":213,"line":333},[211,2543,2544],{"class":255}," \u002F\u002F foo会成为所创建对象的数据属性\n",[211,2546,2547,2550,2552],{"class":213,"line":339},[211,2548,2549],{"class":2049}," foo",[211,2551,2053],{"class":225},[211,2553,2229],{"class":225},[211,2555,2556,2558,2560,2562],{"class":213,"line":1967},[211,2557,2355],{"class":2049},[211,2559,2053],{"class":225},[211,2561,2252],{"class":876},[211,2563,2242],{"class":225},[211,2565,2566,2569,2571,2573],{"class":213,"line":1978},[211,2567,2568],{"class":2049}," configurable",[211,2570,2053],{"class":225},[211,2572,2252],{"class":876},[211,2574,2242],{"class":225},[211,2576,2577,2579,2581,2583,2586,2588],{"class":213,"line":1990},[211,2578,2344],{"class":2049},[211,2580,2053],{"class":225},[211,2582,2220],{"class":225},[211,2584,2585],{"class":354},"hello",[211,2587,351],{"class":225},[211,2589,2242],{"class":225},[211,2591,2592],{"class":213,"line":2001},[211,2593,2366],{"class":225},[211,2595,2597],{"class":213,"line":2596},16,[211,2598,2599],{"class":255}," \u002F\u002F bar会成为所创建对象的访问器属性\n",[211,2601,2603,2606,2608],{"class":213,"line":2602},17,[211,2604,2605],{"class":2049}," bar",[211,2607,2053],{"class":225},[211,2609,2229],{"class":225},[211,2611,2613,2615,2617,2619],{"class":213,"line":2612},18,[211,2614,2568],{"class":2049},[211,2616,2053],{"class":225},[211,2618,877],{"class":876},[211,2620,2242],{"class":225},[211,2622,2624,2627,2629],{"class":213,"line":2623},19,[211,2625,2626],{"class":2049}," get",[211,2628,249],{"class":225},[211,2630,2229],{"class":225},[211,2632,2634,2638,2640],{"class":213,"line":2633},20,[211,2635,2637],{"class":2636},"s7zQu"," return",[211,2639,1350],{"class":229},[211,2641,233],{"class":225},[211,2643,2645],{"class":213,"line":2644},21,[211,2646,2647],{"class":225}," },\n",[211,2649,2651,2654,2656,2660,2662],{"class":213,"line":2650},22,[211,2652,2653],{"class":2049}," set",[211,2655,348],{"class":225},[211,2657,2659],{"class":2658},"sHdIc","value",[211,2661,360],{"class":225},[211,2663,2229],{"class":225},[211,2665,2667,2670,2672,2674,2676,2678,2681,2683,2685,2688,2690],{"class":213,"line":2666},23,[211,2668,2669],{"class":221}," console",[211,2671,242],{"class":225},[211,2673,2144],{"class":245},[211,2675,348],{"class":2049},[211,2677,351],{"class":225},[211,2679,2680],{"class":354},"Setting `o.bar` to",[211,2682,351],{"class":225},[211,2684,791],{"class":225},[211,2686,2687],{"class":221}," value",[211,2689,360],{"class":2049},[211,2691,233],{"class":225},[211,2693,2695],{"class":213,"line":2694},24,[211,2696,2647],{"class":225},[211,2698,2700],{"class":213,"line":2699},25,[211,2701,2366],{"class":225},[211,2703,2705,2707,2709],{"class":213,"line":2704},26,[211,2706,2281],{"class":225},[211,2708,360],{"class":221},[211,2710,233],{"class":225},[211,2712,2714],{"class":213,"line":2713},27,[211,2715,2716],{"class":255},"\u002F\u002F {foo: 'hello'}\n",[396,2718,2720],{"id":2719},"objectkeys","Object.keys()",[179,2722,2723],{},"返回一个由一个给定对象的自身可枚举属性组成的数组，数组中属性名的排列顺序和正常循环遍历该对象时返回的顺序一致。",[202,2725,2727],{"className":204,"code":2726,"language":206,"meta":207,"style":207},"const obj = { name: \"javascript\", age: 20 };\nObject.prototype.history = \"lang\";\n\nObject.keys(obj); \u002F\u002F ['name', 'age']\nObject.keys([\"a\", \"b\", \"c\"]); \u002F\u002F ['0', '1', '2']\nObject.keys({ 100: \"a\", 2: \"b\", 7: \"c\" }); \u002F\u002F ['2', '7', '100']\nObject.keys(\"foo\"); \u002F\u002F ['0', '1', '2']\n",[192,2728,2729,2763,2787,2791,2807,2850,2909],{"__ignoreMap":207},[211,2730,2731,2733,2735,2737,2739,2742,2744,2746,2749,2751,2753,2756,2758,2761],{"class":213,"line":214},[211,2732,949],{"class":217},[211,2734,2109],{"class":221},[211,2736,226],{"class":225},[211,2738,2046],{"class":225},[211,2740,2741],{"class":2049}," name",[211,2743,2053],{"class":225},[211,2745,2220],{"class":225},[211,2747,2748],{"class":354},"javascript",[211,2750,351],{"class":225},[211,2752,791],{"class":225},[211,2754,2755],{"class":2049}," age",[211,2757,2053],{"class":225},[211,2759,2760],{"class":229}," 20",[211,2762,2058],{"class":225},[211,2764,2765,2767,2769,2771,2773,2776,2778,2780,2783,2785],{"class":213,"line":236},[211,2766,2207],{"class":2503},[211,2768,242],{"class":225},[211,2770,2535],{"class":221},[211,2772,242],{"class":225},[211,2774,2775],{"class":221},"history ",[211,2777,226],{"class":225},[211,2779,2220],{"class":225},[211,2781,2782],{"class":354},"lang",[211,2784,351],{"class":225},[211,2786,233],{"class":225},[211,2788,2789],{"class":213,"line":259},[211,2790,263],{"emptyLinePlaceholder":262},[211,2792,2793,2795,2797,2800,2802,2804],{"class":213,"line":266},[211,2794,2207],{"class":221},[211,2796,242],{"class":225},[211,2798,2799],{"class":245},"keys",[211,2801,2147],{"class":221},[211,2803,252],{"class":225},[211,2805,2806],{"class":255}," \u002F\u002F ['name', 'age']\n",[211,2808,2809,2811,2813,2815,2818,2820,2822,2824,2826,2828,2831,2833,2835,2837,2840,2842,2845,2847],{"class":213,"line":279},[211,2810,2207],{"class":221},[211,2812,242],{"class":225},[211,2814,2799],{"class":245},[211,2816,2817],{"class":221},"([",[211,2819,351],{"class":225},[211,2821,373],{"class":354},[211,2823,351],{"class":225},[211,2825,791],{"class":225},[211,2827,2220],{"class":225},[211,2829,2830],{"class":354},"b",[211,2832,351],{"class":225},[211,2834,791],{"class":225},[211,2836,2220],{"class":225},[211,2838,2839],{"class":354},"c",[211,2841,351],{"class":225},[211,2843,2844],{"class":221},"])",[211,2846,252],{"class":225},[211,2848,2849],{"class":255}," \u002F\u002F ['0', '1', '2']\n",[211,2851,2852,2854,2856,2858,2860,2863,2866,2868,2870,2872,2874,2876,2878,2880,2882,2884,2886,2888,2891,2893,2895,2897,2899,2902,2904,2906],{"class":213,"line":295},[211,2853,2207],{"class":221},[211,2855,242],{"class":225},[211,2857,2799],{"class":245},[211,2859,348],{"class":221},[211,2861,2862],{"class":225},"{",[211,2864,2865],{"class":229}," 100",[211,2867,2053],{"class":225},[211,2869,2220],{"class":225},[211,2871,373],{"class":354},[211,2873,351],{"class":225},[211,2875,791],{"class":225},[211,2877,806],{"class":229},[211,2879,2053],{"class":225},[211,2881,2220],{"class":225},[211,2883,2830],{"class":354},[211,2885,351],{"class":225},[211,2887,791],{"class":225},[211,2889,2890],{"class":229}," 7",[211,2892,2053],{"class":225},[211,2894,2220],{"class":225},[211,2896,2839],{"class":354},[211,2898,351],{"class":225},[211,2900,2901],{"class":225}," }",[211,2903,360],{"class":221},[211,2905,252],{"class":225},[211,2907,2908],{"class":255}," \u002F\u002F ['2', '7', '100']\n",[211,2910,2911,2913,2915,2917,2919,2921,2923,2925,2927,2929],{"class":213,"line":300},[211,2912,2207],{"class":221},[211,2914,242],{"class":225},[211,2916,2799],{"class":245},[211,2918,348],{"class":221},[211,2920,351],{"class":225},[211,2922,1916],{"class":354},[211,2924,351],{"class":225},[211,2926,360],{"class":221},[211,2928,252],{"class":225},[211,2930,2849],{"class":255},[396,2932,2934],{"id":2933},"objectvalues","Object.values()",[179,2936,2937],{},"返回一个给定对象自身的所有可枚举属性值的数组，值的顺序与使用for...in循环的顺序相同（区别在于 for...in 循环枚举原型链中的属性）。",[202,2939,2941],{"className":204,"code":2940,"language":206,"meta":207,"style":207},"const obj = { name: \"javascript\", age: 20 };\nObject.prototype.history = \"lang\";\n\nObject.values(obj); \u002F\u002F ['javascript', 20]\nObject.values({ 100: \"a\", 2: \"b\", 7: \"c\" }); \u002F\u002F ['b', 'c', 'a']\n",[192,2942,2943,2973,2995,2999,3015],{"__ignoreMap":207},[211,2944,2945,2947,2949,2951,2953,2955,2957,2959,2961,2963,2965,2967,2969,2971],{"class":213,"line":214},[211,2946,949],{"class":217},[211,2948,2109],{"class":221},[211,2950,226],{"class":225},[211,2952,2046],{"class":225},[211,2954,2741],{"class":2049},[211,2956,2053],{"class":225},[211,2958,2220],{"class":225},[211,2960,2748],{"class":354},[211,2962,351],{"class":225},[211,2964,791],{"class":225},[211,2966,2755],{"class":2049},[211,2968,2053],{"class":225},[211,2970,2760],{"class":229},[211,2972,2058],{"class":225},[211,2974,2975,2977,2979,2981,2983,2985,2987,2989,2991,2993],{"class":213,"line":236},[211,2976,2207],{"class":2503},[211,2978,242],{"class":225},[211,2980,2535],{"class":221},[211,2982,242],{"class":225},[211,2984,2775],{"class":221},[211,2986,226],{"class":225},[211,2988,2220],{"class":225},[211,2990,2782],{"class":354},[211,2992,351],{"class":225},[211,2994,233],{"class":225},[211,2996,2997],{"class":213,"line":259},[211,2998,263],{"emptyLinePlaceholder":262},[211,3000,3001,3003,3005,3008,3010,3012],{"class":213,"line":266},[211,3002,2207],{"class":221},[211,3004,242],{"class":225},[211,3006,3007],{"class":245},"values",[211,3009,2147],{"class":221},[211,3011,252],{"class":225},[211,3013,3014],{"class":255}," \u002F\u002F ['javascript', 20]\n",[211,3016,3017,3019,3021,3023,3025,3027,3029,3031,3033,3035,3037,3039,3041,3043,3045,3047,3049,3051,3053,3055,3057,3059,3061,3063,3065,3067],{"class":213,"line":279},[211,3018,2207],{"class":221},[211,3020,242],{"class":225},[211,3022,3007],{"class":245},[211,3024,348],{"class":221},[211,3026,2862],{"class":225},[211,3028,2865],{"class":229},[211,3030,2053],{"class":225},[211,3032,2220],{"class":225},[211,3034,373],{"class":354},[211,3036,351],{"class":225},[211,3038,791],{"class":225},[211,3040,806],{"class":229},[211,3042,2053],{"class":225},[211,3044,2220],{"class":225},[211,3046,2830],{"class":354},[211,3048,351],{"class":225},[211,3050,791],{"class":225},[211,3052,2890],{"class":229},[211,3054,2053],{"class":225},[211,3056,2220],{"class":225},[211,3058,2839],{"class":354},[211,3060,351],{"class":225},[211,3062,2901],{"class":225},[211,3064,360],{"class":221},[211,3066,252],{"class":225},[211,3068,3069],{"class":255}," \u002F\u002F ['b', 'c', 'a']\n",[396,3071,3073],{"id":3072},"objectentries","Object.entries()",[179,3075,3076],{},"返回一个给定对象自身可枚举属性的键值对数组，其排列与使用 for...in 循环遍历该对象时返回的顺序一致（区别在于 for-in 循环还会枚举原型链中的属性）。",[202,3078,3080],{"className":204,"code":3079,"language":206,"meta":207,"style":207},"const obj = { name: \"javascript\", age: 20 };\nObject.prototype.history = \"lang\";\n\nObject.entries(obj); \u002F\u002F [['name', 'javascript'],['age', 20]]\n\u002F\u002F 对象转Map\nnew Map(Object.entries(obj)); \u002F\u002F Map(2) {'name' => 'javascript', 'age' => 20}\n",[192,3081,3082,3112,3134,3138,3154,3159],{"__ignoreMap":207},[211,3083,3084,3086,3088,3090,3092,3094,3096,3098,3100,3102,3104,3106,3108,3110],{"class":213,"line":214},[211,3085,949],{"class":217},[211,3087,2109],{"class":221},[211,3089,226],{"class":225},[211,3091,2046],{"class":225},[211,3093,2741],{"class":2049},[211,3095,2053],{"class":225},[211,3097,2220],{"class":225},[211,3099,2748],{"class":354},[211,3101,351],{"class":225},[211,3103,791],{"class":225},[211,3105,2755],{"class":2049},[211,3107,2053],{"class":225},[211,3109,2760],{"class":229},[211,3111,2058],{"class":225},[211,3113,3114,3116,3118,3120,3122,3124,3126,3128,3130,3132],{"class":213,"line":236},[211,3115,2207],{"class":2503},[211,3117,242],{"class":225},[211,3119,2535],{"class":221},[211,3121,242],{"class":225},[211,3123,2775],{"class":221},[211,3125,226],{"class":225},[211,3127,2220],{"class":225},[211,3129,2782],{"class":354},[211,3131,351],{"class":225},[211,3133,233],{"class":225},[211,3135,3136],{"class":213,"line":259},[211,3137,263],{"emptyLinePlaceholder":262},[211,3139,3140,3142,3144,3147,3149,3151],{"class":213,"line":266},[211,3141,2207],{"class":221},[211,3143,242],{"class":225},[211,3145,3146],{"class":245},"entries",[211,3148,2147],{"class":221},[211,3150,252],{"class":225},[211,3152,3153],{"class":255}," \u002F\u002F [['name', 'javascript'],['age', 20]]\n",[211,3155,3156],{"class":213,"line":279},[211,3157,3158],{"class":255},"\u002F\u002F 对象转Map\n",[211,3160,3161,3164,3167,3170,3172,3174,3177,3179],{"class":213,"line":295},[211,3162,3163],{"class":225},"new",[211,3165,3166],{"class":245}," Map",[211,3168,3169],{"class":221},"(Object",[211,3171,242],{"class":225},[211,3173,3146],{"class":245},[211,3175,3176],{"class":221},"(obj))",[211,3178,252],{"class":225},[211,3180,3181],{"class":255}," \u002F\u002F Map(2) {'name' => 'javascript', 'age' => 20}\n",[396,3183,3185],{"id":3184},"objectis","Object.is()",[179,3187,3188],{},"判断两个值是否为同一个值。",[202,3190,3192],{"className":204,"code":3191,"language":206,"meta":207,"style":207},"Object.is(\"foo\", \"foo\"); \u002F\u002F true\nObject.is(window, window); \u002F\u002F true\n\nObject.is(\"foo\", \"bar\"); \u002F\u002F false\nObject.is([], []); \u002F\u002F false\n\nconst foo = { a: 1 };\nconst bar = { a: 1 };\nObject.is(foo, foo); \u002F\u002F true\nObject.is(foo, bar); \u002F\u002F false\n\nObject.is(null, null); \u002F\u002F true\n\n\u002F\u002F 特例\nObject.is(0, -0); \u002F\u002F false\nObject.is(0, +0); \u002F\u002F true\nObject.is(-0, -0); \u002F\u002F true\nObject.is(Number.NaN, 0 \u002F 0); \u002F\u002F true\n",[192,3193,3194,3226,3246,3250,3282,3302,3306,3325,3344,3364,3383,3387,3408,3412,3417,3441,3466,3492],{"__ignoreMap":207},[211,3195,3196,3198,3200,3203,3205,3207,3209,3211,3213,3215,3217,3219,3221,3223],{"class":213,"line":214},[211,3197,2207],{"class":221},[211,3199,242],{"class":225},[211,3201,3202],{"class":245},"is",[211,3204,348],{"class":221},[211,3206,351],{"class":225},[211,3208,1916],{"class":354},[211,3210,351],{"class":225},[211,3212,791],{"class":225},[211,3214,2220],{"class":225},[211,3216,1916],{"class":354},[211,3218,351],{"class":225},[211,3220,360],{"class":221},[211,3222,252],{"class":225},[211,3224,3225],{"class":255}," \u002F\u002F true\n",[211,3227,3228,3230,3232,3234,3237,3239,3242,3244],{"class":213,"line":236},[211,3229,2207],{"class":221},[211,3231,242],{"class":225},[211,3233,3202],{"class":245},[211,3235,3236],{"class":221},"(window",[211,3238,791],{"class":225},[211,3240,3241],{"class":221}," window)",[211,3243,252],{"class":225},[211,3245,3225],{"class":255},[211,3247,3248],{"class":213,"line":259},[211,3249,263],{"emptyLinePlaceholder":262},[211,3251,3252,3254,3256,3258,3260,3262,3264,3266,3268,3270,3273,3275,3277,3279],{"class":213,"line":266},[211,3253,2207],{"class":221},[211,3255,242],{"class":225},[211,3257,3202],{"class":245},[211,3259,348],{"class":221},[211,3261,351],{"class":225},[211,3263,1916],{"class":354},[211,3265,351],{"class":225},[211,3267,791],{"class":225},[211,3269,2220],{"class":225},[211,3271,3272],{"class":354},"bar",[211,3274,351],{"class":225},[211,3276,360],{"class":221},[211,3278,252],{"class":225},[211,3280,3281],{"class":255}," \u002F\u002F false\n",[211,3283,3284,3286,3288,3290,3293,3295,3298,3300],{"class":213,"line":279},[211,3285,2207],{"class":221},[211,3287,242],{"class":225},[211,3289,3202],{"class":245},[211,3291,3292],{"class":221},"([]",[211,3294,791],{"class":225},[211,3296,3297],{"class":221}," [])",[211,3299,252],{"class":225},[211,3301,3281],{"class":255},[211,3303,3304],{"class":213,"line":295},[211,3305,263],{"emptyLinePlaceholder":262},[211,3307,3308,3310,3313,3315,3317,3319,3321,3323],{"class":213,"line":300},[211,3309,949],{"class":217},[211,3311,3312],{"class":221}," foo ",[211,3314,226],{"class":225},[211,3316,2046],{"class":225},[211,3318,2050],{"class":2049},[211,3320,2053],{"class":225},[211,3322,801],{"class":229},[211,3324,2058],{"class":225},[211,3326,3327,3329,3332,3334,3336,3338,3340,3342],{"class":213,"line":312},[211,3328,949],{"class":217},[211,3330,3331],{"class":221}," bar ",[211,3333,226],{"class":225},[211,3335,2046],{"class":225},[211,3337,2050],{"class":2049},[211,3339,2053],{"class":225},[211,3341,801],{"class":229},[211,3343,2058],{"class":225},[211,3345,3346,3348,3350,3352,3355,3357,3360,3362],{"class":213,"line":328},[211,3347,2207],{"class":221},[211,3349,242],{"class":225},[211,3351,3202],{"class":245},[211,3353,3354],{"class":221},"(foo",[211,3356,791],{"class":225},[211,3358,3359],{"class":221}," foo)",[211,3361,252],{"class":225},[211,3363,3225],{"class":255},[211,3365,3366,3368,3370,3372,3374,3376,3379,3381],{"class":213,"line":333},[211,3367,2207],{"class":221},[211,3369,242],{"class":225},[211,3371,3202],{"class":245},[211,3373,3354],{"class":221},[211,3375,791],{"class":225},[211,3377,3378],{"class":221}," bar)",[211,3380,252],{"class":225},[211,3382,3281],{"class":255},[211,3384,3385],{"class":213,"line":339},[211,3386,263],{"emptyLinePlaceholder":262},[211,3388,3389,3391,3393,3395,3397,3399,3402,3404,3406],{"class":213,"line":1967},[211,3390,2207],{"class":221},[211,3392,242],{"class":225},[211,3394,3202],{"class":245},[211,3396,348],{"class":221},[211,3398,1008],{"class":225},[211,3400,3401],{"class":225}," null",[211,3403,360],{"class":221},[211,3405,252],{"class":225},[211,3407,3225],{"class":255},[211,3409,3410],{"class":213,"line":1978},[211,3411,263],{"emptyLinePlaceholder":262},[211,3413,3414],{"class":213,"line":1990},[211,3415,3416],{"class":255},"\u002F\u002F 特例\n",[211,3418,3419,3421,3423,3425,3427,3429,3431,3433,3435,3437,3439],{"class":213,"line":2001},[211,3420,2207],{"class":221},[211,3422,242],{"class":225},[211,3424,3202],{"class":245},[211,3426,348],{"class":221},[211,3428,1704],{"class":229},[211,3430,791],{"class":225},[211,3432,794],{"class":225},[211,3434,1704],{"class":229},[211,3436,360],{"class":221},[211,3438,252],{"class":225},[211,3440,3281],{"class":255},[211,3442,3443,3445,3447,3449,3451,3453,3455,3458,3460,3462,3464],{"class":213,"line":2596},[211,3444,2207],{"class":221},[211,3446,242],{"class":225},[211,3448,3202],{"class":245},[211,3450,348],{"class":221},[211,3452,1704],{"class":229},[211,3454,791],{"class":225},[211,3456,3457],{"class":225}," +",[211,3459,1704],{"class":229},[211,3461,360],{"class":221},[211,3463,252],{"class":225},[211,3465,3225],{"class":255},[211,3467,3468,3470,3472,3474,3476,3478,3480,3482,3484,3486,3488,3490],{"class":213,"line":2602},[211,3469,2207],{"class":221},[211,3471,242],{"class":225},[211,3473,3202],{"class":245},[211,3475,348],{"class":221},[211,3477,456],{"class":225},[211,3479,1704],{"class":229},[211,3481,791],{"class":225},[211,3483,794],{"class":225},[211,3485,1704],{"class":229},[211,3487,360],{"class":221},[211,3489,252],{"class":225},[211,3491,3225],{"class":255},[211,3493,3494,3496,3498,3500,3502,3504,3506,3508,3511,3514,3516,3518,3520],{"class":213,"line":2612},[211,3495,2207],{"class":221},[211,3497,242],{"class":225},[211,3499,3202],{"class":245},[211,3501,1892],{"class":221},[211,3503,242],{"class":225},[211,3505,750],{"class":221},[211,3507,791],{"class":225},[211,3509,3510],{"class":229}," 0",[211,3512,3513],{"class":225}," \u002F",[211,3515,3510],{"class":229},[211,3517,360],{"class":221},[211,3519,252],{"class":225},[211,3521,3225],{"class":255},[396,3523,3525],{"id":3524},"objectgetownpropertynames","Object.getOwnPropertyNames()",[179,3527,3528],{},"返回一个由指定对象的所有自身属性的属性名（包括不可枚举属性但不包括Symbol值作为名称的属性）组成的数组。",[202,3530,3532],{"className":204,"code":3531,"language":206,"meta":207,"style":207},"Object.getOwnPropertyNames([\"a\", \"b\", \"c\"]).sort(); \u002F\u002F [\"0\", \"1\", \"2\", \"length\"]\n\n\u002F\u002F 类数组对象\nconst obj = { 0: \"a\", 1: \"b\", 2: \"c\" };\nObject.getOwnPropertyNames(obj).sort(); \u002F\u002F [\"0\", \"1\", \"2\"]\n\n\u002F\u002F 使用Array.forEach输出属性名和属性值\nObject.getOwnPropertyNames(obj).forEach((val, idx, array) => {\n console.log(val + \" -> \" + obj[val]);\n});\n\u002F\u002F 输出\n\u002F\u002F 0 -> a\n\u002F\u002F 1 -> b\n\u002F\u002F 2 -> c\n\n\u002F\u002F 不可枚举属性\nconst my_obj = Object.create(\n {},\n {\n getFoo: {\n value() {\n return this.foo;\n },\n enumerable: false,\n },\n },\n);\nmy_obj.foo = 1;\n\nconsole.log(Object.getOwnPropertyNames(my_obj).sort()); \u002F\u002F [\"foo\", \"getFoo\"]\n",[192,3533,3534,3581,3585,3590,3636,3657,3661,3666,3705,3741,3749,3754,3759,3764,3769,3773,3778,3796,3801,3806,3815,3824,3836,3841,3852,3856,3860,3866,3883,3888],{"__ignoreMap":207},[211,3535,3536,3538,3540,3543,3545,3547,3549,3551,3553,3555,3557,3559,3561,3563,3565,3567,3569,3571,3574,3576,3578],{"class":213,"line":214},[211,3537,2207],{"class":221},[211,3539,242],{"class":225},[211,3541,3542],{"class":245},"getOwnPropertyNames",[211,3544,2817],{"class":221},[211,3546,351],{"class":225},[211,3548,373],{"class":354},[211,3550,351],{"class":225},[211,3552,791],{"class":225},[211,3554,2220],{"class":225},[211,3556,2830],{"class":354},[211,3558,351],{"class":225},[211,3560,791],{"class":225},[211,3562,2220],{"class":225},[211,3564,2839],{"class":354},[211,3566,351],{"class":225},[211,3568,2844],{"class":221},[211,3570,242],{"class":225},[211,3572,3573],{"class":245},"sort",[211,3575,249],{"class":221},[211,3577,252],{"class":225},[211,3579,3580],{"class":255}," \u002F\u002F [\"0\", \"1\", \"2\", \"length\"]\n",[211,3582,3583],{"class":213,"line":236},[211,3584,263],{"emptyLinePlaceholder":262},[211,3586,3587],{"class":213,"line":259},[211,3588,3589],{"class":255},"\u002F\u002F 类数组对象\n",[211,3591,3592,3594,3596,3598,3600,3602,3604,3606,3608,3610,3612,3614,3616,3618,3620,3622,3624,3626,3628,3630,3632,3634],{"class":213,"line":266},[211,3593,949],{"class":217},[211,3595,2109],{"class":221},[211,3597,226],{"class":225},[211,3599,2046],{"class":225},[211,3601,3510],{"class":229},[211,3603,2053],{"class":225},[211,3605,2220],{"class":225},[211,3607,373],{"class":354},[211,3609,351],{"class":225},[211,3611,791],{"class":225},[211,3613,801],{"class":229},[211,3615,2053],{"class":225},[211,3617,2220],{"class":225},[211,3619,2830],{"class":354},[211,3621,351],{"class":225},[211,3623,791],{"class":225},[211,3625,806],{"class":229},[211,3627,2053],{"class":225},[211,3629,2220],{"class":225},[211,3631,2839],{"class":354},[211,3633,351],{"class":225},[211,3635,2058],{"class":225},[211,3637,3638,3640,3642,3644,3646,3648,3650,3652,3654],{"class":213,"line":279},[211,3639,2207],{"class":221},[211,3641,242],{"class":225},[211,3643,3542],{"class":245},[211,3645,2147],{"class":221},[211,3647,242],{"class":225},[211,3649,3573],{"class":245},[211,3651,249],{"class":221},[211,3653,252],{"class":225},[211,3655,3656],{"class":255}," \u002F\u002F [\"0\", \"1\", \"2\"]\n",[211,3658,3659],{"class":213,"line":295},[211,3660,263],{"emptyLinePlaceholder":262},[211,3662,3663],{"class":213,"line":300},[211,3664,3665],{"class":255},"\u002F\u002F 使用Array.forEach输出属性名和属性值\n",[211,3667,3668,3670,3672,3674,3676,3678,3681,3683,3685,3688,3690,3693,3695,3698,3700,3703],{"class":213,"line":312},[211,3669,2207],{"class":221},[211,3671,242],{"class":225},[211,3673,3542],{"class":245},[211,3675,2147],{"class":221},[211,3677,242],{"class":225},[211,3679,3680],{"class":245},"forEach",[211,3682,348],{"class":221},[211,3684,348],{"class":225},[211,3686,3687],{"class":2658},"val",[211,3689,791],{"class":225},[211,3691,3692],{"class":2658}," idx",[211,3694,791],{"class":225},[211,3696,3697],{"class":2658}," array",[211,3699,360],{"class":225},[211,3701,3702],{"class":217}," =>",[211,3704,2229],{"class":225},[211,3706,3707,3710,3712,3714,3716,3718,3720,3722,3725,3727,3729,3732,3735,3737,3739],{"class":213,"line":328},[211,3708,3709],{"class":221}," console",[211,3711,242],{"class":225},[211,3713,2144],{"class":245},[211,3715,348],{"class":2049},[211,3717,3687],{"class":221},[211,3719,3457],{"class":225},[211,3721,2220],{"class":225},[211,3723,3724],{"class":354}," -> ",[211,3726,351],{"class":225},[211,3728,3457],{"class":225},[211,3730,3731],{"class":221}," obj",[211,3733,3734],{"class":2049},"[",[211,3736,3687],{"class":221},[211,3738,2844],{"class":2049},[211,3740,233],{"class":225},[211,3742,3743,3745,3747],{"class":213,"line":333},[211,3744,2281],{"class":225},[211,3746,360],{"class":221},[211,3748,233],{"class":225},[211,3750,3751],{"class":213,"line":339},[211,3752,3753],{"class":255},"\u002F\u002F 输出\n",[211,3755,3756],{"class":213,"line":1967},[211,3757,3758],{"class":255},"\u002F\u002F 0 -> a\n",[211,3760,3761],{"class":213,"line":1978},[211,3762,3763],{"class":255},"\u002F\u002F 1 -> b\n",[211,3765,3766],{"class":213,"line":1990},[211,3767,3768],{"class":255},"\u002F\u002F 2 -> c\n",[211,3770,3771],{"class":213,"line":2001},[211,3772,263],{"emptyLinePlaceholder":262},[211,3774,3775],{"class":213,"line":2596},[211,3776,3777],{"class":255},"\u002F\u002F 不可枚举属性\n",[211,3779,3780,3782,3785,3787,3789,3791,3793],{"class":213,"line":2602},[211,3781,949],{"class":217},[211,3783,3784],{"class":221}," my_obj ",[211,3786,226],{"class":225},[211,3788,2114],{"class":221},[211,3790,242],{"class":225},[211,3792,2461],{"class":245},[211,3794,3795],{"class":221},"(\n",[211,3797,3798],{"class":213,"line":2612},[211,3799,3800],{"class":225}," {},\n",[211,3802,3803],{"class":213,"line":2623},[211,3804,3805],{"class":225}," {\n",[211,3807,3808,3811,3813],{"class":213,"line":2633},[211,3809,3810],{"class":2049}," getFoo",[211,3812,2053],{"class":225},[211,3814,2229],{"class":225},[211,3816,3817,3820,3822],{"class":213,"line":2644},[211,3818,3819],{"class":2049}," value",[211,3821,249],{"class":225},[211,3823,2229],{"class":225},[211,3825,3826,3829,3832,3834],{"class":213,"line":2650},[211,3827,3828],{"class":2636}," return",[211,3830,3831],{"class":225}," this.",[211,3833,1916],{"class":221},[211,3835,233],{"class":225},[211,3837,3838],{"class":213,"line":2666},[211,3839,3840],{"class":225}," },\n",[211,3842,3843,3846,3848,3850],{"class":213,"line":2694},[211,3844,3845],{"class":2049}," enumerable",[211,3847,2053],{"class":225},[211,3849,877],{"class":876},[211,3851,2242],{"class":225},[211,3853,3854],{"class":213,"line":2699},[211,3855,2647],{"class":225},[211,3857,3858],{"class":213,"line":2704},[211,3859,2366],{"class":225},[211,3861,3862,3864],{"class":213,"line":2713},[211,3863,360],{"class":221},[211,3865,233],{"class":225},[211,3867,3869,3872,3874,3877,3879,3881],{"class":213,"line":3868},28,[211,3870,3871],{"class":221},"my_obj",[211,3873,242],{"class":225},[211,3875,3876],{"class":221},"foo ",[211,3878,226],{"class":225},[211,3880,801],{"class":229},[211,3882,233],{"class":225},[211,3884,3886],{"class":213,"line":3885},29,[211,3887,263],{"emptyLinePlaceholder":262},[211,3889,3891,3893,3895,3897,3899,3901,3903,3906,3908,3910,3913,3915],{"class":213,"line":3890},30,[211,3892,2139],{"class":221},[211,3894,242],{"class":225},[211,3896,2144],{"class":245},[211,3898,3169],{"class":221},[211,3900,242],{"class":225},[211,3902,3542],{"class":245},[211,3904,3905],{"class":221},"(my_obj)",[211,3907,242],{"class":225},[211,3909,3573],{"class":245},[211,3911,3912],{"class":221},"())",[211,3914,252],{"class":225},[211,3916,3917],{"class":255}," \u002F\u002F [\"foo\", \"getFoo\"]\n",[396,3919,3921],{"id":3920},"objectgetownpropertysymbols","Object.getOwnPropertySymbols()",[179,3923,3924],{},"返回一个给定对象自身的所有 Symbol 属性的数组。",[202,3926,3928],{"className":204,"code":3927,"language":206,"meta":207,"style":207},"let obj = {};\nconst a = Symbol(\"a\");\nconst b = Symbol.for(\"b\");\n\nobj[a] = \"localSymbol\";\nobj[b] = \"globalSymbol\";\n\nconst objectSymbols = Object.getOwnPropertySymbols(obj);\n\nconsole.log(objectSymbols.length); \u002F\u002F 2\nconsole.log(objectSymbols); \u002F\u002F [Symbol(a), Symbol(b)]\nconsole.log(objectSymbols[0]); \u002F\u002F Symbol(a)\n\n\u002F\u002F 拓展\n\u002F\u002F 静态方法 Reflect.ownKeys() 返回一个由目标对象自身的属性键组成的数组。\nobj = { name: \"javascript\", age: 20 };\nObject.defineProperties(obj, {\n history: {\n value: \"lang\",\n },\n foo: {\n value: Symbol(\"foo\"),\n },\n});\nobj; \u002F\u002F {name: 'javascript', age: 20, history: 'lang', foo: Symbol(foo)}\nReflect.ownKeys(obj); \u002F\u002F ['name', 'age', 'history', 'foo']\n\u002F\u002F 等价于\nObject.getOwnPropertyNames(obj).concat(Object.getOwnPropertySymbols(obj));\n\u002F\u002F ['name', 'age', 'history', 'foo']\n",[192,3929,3930,3940,3964,3992,3996,4012,4028,4032,4052,4056,4076,4092,4112,4116,4121,4126,4155,4169,4178,4192,4196,4204,4224,4228,4236,4246,4263,4268,4293],{"__ignoreMap":207},[211,3931,3932,3934,3936,3938],{"class":213,"line":214},[211,3933,218],{"class":217},[211,3935,2109],{"class":221},[211,3937,226],{"class":225},[211,3939,2315],{"class":225},[211,3941,3942,3944,3947,3949,3952,3954,3956,3958,3960,3962],{"class":213,"line":236},[211,3943,949],{"class":217},[211,3945,3946],{"class":221}," a ",[211,3948,226],{"class":225},[211,3950,3951],{"class":245}," Symbol",[211,3953,348],{"class":221},[211,3955,351],{"class":225},[211,3957,373],{"class":354},[211,3959,351],{"class":225},[211,3961,360],{"class":221},[211,3963,233],{"class":225},[211,3965,3966,3968,3971,3973,3975,3977,3980,3982,3984,3986,3988,3990],{"class":213,"line":259},[211,3967,949],{"class":217},[211,3969,3970],{"class":221}," b ",[211,3972,226],{"class":225},[211,3974,3951],{"class":221},[211,3976,242],{"class":225},[211,3978,3979],{"class":245},"for",[211,3981,348],{"class":221},[211,3983,351],{"class":225},[211,3985,2830],{"class":354},[211,3987,351],{"class":225},[211,3989,360],{"class":221},[211,3991,233],{"class":225},[211,3993,3994],{"class":213,"line":266},[211,3995,263],{"emptyLinePlaceholder":262},[211,3997,3998,4001,4003,4005,4008,4010],{"class":213,"line":279},[211,3999,4000],{"class":221},"obj[a] ",[211,4002,226],{"class":225},[211,4004,2220],{"class":225},[211,4006,4007],{"class":354},"localSymbol",[211,4009,351],{"class":225},[211,4011,233],{"class":225},[211,4013,4014,4017,4019,4021,4024,4026],{"class":213,"line":295},[211,4015,4016],{"class":221},"obj[b] ",[211,4018,226],{"class":225},[211,4020,2220],{"class":225},[211,4022,4023],{"class":354},"globalSymbol",[211,4025,351],{"class":225},[211,4027,233],{"class":225},[211,4029,4030],{"class":213,"line":300},[211,4031,263],{"emptyLinePlaceholder":262},[211,4033,4034,4036,4039,4041,4043,4045,4048,4050],{"class":213,"line":312},[211,4035,949],{"class":217},[211,4037,4038],{"class":221}," objectSymbols ",[211,4040,226],{"class":225},[211,4042,2114],{"class":221},[211,4044,242],{"class":225},[211,4046,4047],{"class":245},"getOwnPropertySymbols",[211,4049,2147],{"class":221},[211,4051,233],{"class":225},[211,4053,4054],{"class":213,"line":328},[211,4055,263],{"emptyLinePlaceholder":262},[211,4057,4058,4060,4062,4064,4067,4069,4072,4074],{"class":213,"line":333},[211,4059,2139],{"class":221},[211,4061,242],{"class":225},[211,4063,2144],{"class":245},[211,4065,4066],{"class":221},"(objectSymbols",[211,4068,242],{"class":225},[211,4070,4071],{"class":221},"length)",[211,4073,252],{"class":225},[211,4075,466],{"class":255},[211,4077,4078,4080,4082,4084,4087,4089],{"class":213,"line":339},[211,4079,2139],{"class":221},[211,4081,242],{"class":225},[211,4083,2144],{"class":245},[211,4085,4086],{"class":221},"(objectSymbols)",[211,4088,252],{"class":225},[211,4090,4091],{"class":255}," \u002F\u002F [Symbol(a), Symbol(b)]\n",[211,4093,4094,4096,4098,4100,4103,4105,4107,4109],{"class":213,"line":1967},[211,4095,2139],{"class":221},[211,4097,242],{"class":225},[211,4099,2144],{"class":245},[211,4101,4102],{"class":221},"(objectSymbols[",[211,4104,1704],{"class":229},[211,4106,2844],{"class":221},[211,4108,252],{"class":225},[211,4110,4111],{"class":255}," \u002F\u002F Symbol(a)\n",[211,4113,4114],{"class":213,"line":1978},[211,4115,263],{"emptyLinePlaceholder":262},[211,4117,4118],{"class":213,"line":1990},[211,4119,4120],{"class":255},"\u002F\u002F 拓展\n",[211,4122,4123],{"class":213,"line":2001},[211,4124,4125],{"class":255},"\u002F\u002F 静态方法 Reflect.ownKeys() 返回一个由目标对象自身的属性键组成的数组。\n",[211,4127,4128,4131,4133,4135,4137,4139,4141,4143,4145,4147,4149,4151,4153],{"class":213,"line":2596},[211,4129,4130],{"class":221},"obj ",[211,4132,226],{"class":225},[211,4134,2046],{"class":225},[211,4136,2741],{"class":2049},[211,4138,2053],{"class":225},[211,4140,2220],{"class":225},[211,4142,2748],{"class":354},[211,4144,351],{"class":225},[211,4146,791],{"class":225},[211,4148,2755],{"class":2049},[211,4150,2053],{"class":225},[211,4152,2760],{"class":229},[211,4154,2058],{"class":225},[211,4156,4157,4159,4161,4163,4165,4167],{"class":213,"line":2602},[211,4158,2207],{"class":221},[211,4160,242],{"class":225},[211,4162,2324],{"class":245},[211,4164,2215],{"class":221},[211,4166,791],{"class":225},[211,4168,2229],{"class":225},[211,4170,4171,4174,4176],{"class":213,"line":2612},[211,4172,4173],{"class":2049}," history",[211,4175,2053],{"class":225},[211,4177,2229],{"class":225},[211,4179,4180,4182,4184,4186,4188,4190],{"class":213,"line":2623},[211,4181,2344],{"class":2049},[211,4183,2053],{"class":225},[211,4185,2220],{"class":225},[211,4187,2782],{"class":354},[211,4189,351],{"class":225},[211,4191,2242],{"class":225},[211,4193,4194],{"class":213,"line":2633},[211,4195,2366],{"class":225},[211,4197,4198,4200,4202],{"class":213,"line":2644},[211,4199,2549],{"class":2049},[211,4201,2053],{"class":225},[211,4203,2229],{"class":225},[211,4205,4206,4208,4210,4212,4214,4216,4218,4220,4222],{"class":213,"line":2650},[211,4207,2344],{"class":2049},[211,4209,2053],{"class":225},[211,4211,3951],{"class":245},[211,4213,348],{"class":221},[211,4215,351],{"class":225},[211,4217,1916],{"class":354},[211,4219,351],{"class":225},[211,4221,360],{"class":221},[211,4223,2242],{"class":225},[211,4225,4226],{"class":213,"line":2666},[211,4227,2366],{"class":225},[211,4229,4230,4232,4234],{"class":213,"line":2694},[211,4231,2281],{"class":225},[211,4233,360],{"class":221},[211,4235,233],{"class":225},[211,4237,4238,4241,4243],{"class":213,"line":2699},[211,4239,4240],{"class":221},"obj",[211,4242,252],{"class":225},[211,4244,4245],{"class":255}," \u002F\u002F {name: 'javascript', age: 20, history: 'lang', foo: Symbol(foo)}\n",[211,4247,4248,4251,4253,4256,4258,4260],{"class":213,"line":2704},[211,4249,4250],{"class":221},"Reflect",[211,4252,242],{"class":225},[211,4254,4255],{"class":245},"ownKeys",[211,4257,2147],{"class":221},[211,4259,252],{"class":225},[211,4261,4262],{"class":255}," \u002F\u002F ['name', 'age', 'history', 'foo']\n",[211,4264,4265],{"class":213,"line":2713},[211,4266,4267],{"class":255},"\u002F\u002F 等价于\n",[211,4269,4270,4272,4274,4276,4278,4280,4283,4285,4287,4289,4291],{"class":213,"line":3868},[211,4271,2207],{"class":221},[211,4273,242],{"class":225},[211,4275,3542],{"class":245},[211,4277,2147],{"class":221},[211,4279,242],{"class":225},[211,4281,4282],{"class":245},"concat",[211,4284,3169],{"class":221},[211,4286,242],{"class":225},[211,4288,4047],{"class":245},[211,4290,3176],{"class":221},[211,4292,233],{"class":225},[211,4294,4295],{"class":213,"line":3885},[211,4296,4297],{"class":255},"\u002F\u002F ['name', 'age', 'history', 'foo']\n",[367,4299,4300],{},[182,4301,4302,4307,4308,4307,4313],{},[373,4303,4306],{"href":4304,"rel":4305,"target":379},"https:\u002F\u002Fdeveloper.mozilla.org\u002Fzh-CN\u002Fdocs\u002FWeb\u002FJavaScript\u002FReference\u002FGlobal_Objects\u002FObject",[377,378],"数据类型 Object - MDN","、\n",[373,4309,4312],{"href":4310,"rel":4311,"target":379},"https:\u002F\u002Fdeveloper.mozilla.org\u002Fzh-CN\u002Fdocs\u002FWeb\u002FJavaScript\u002FReference\u002FGlobal_Objects\u002FReflect",[377,378],"内置对象 Reflect - MDN",[373,4314,4317],{"href":4315,"rel":4316,"target":379},"https:\u002F\u002Fdeveloper.mozilla.org\u002Fzh-CN\u002Fdocs\u002FWeb\u002FJavaScript\u002FReference\u002FGlobal_Objects\u002FReflect\u002FComparing_Reflect_and_Object_methods",[377,378],"比较 Reflect 和 Object 方法 - MDN",[174,4319,4321],{"id":4320},"forin-和-forof","for…in 和 for…of",[396,4323,4325],{"id":4324},"forin","for...in",[386,4327,4329],{"to":4328},"https:\u002F\u002Fmdn.io\u002Fzh\u002Ffor...in","MDN: for...in",[179,4331,4332],{},"以任意顺序遍历一个对象的除Symbol以外的可枚举属性，包括继承的可枚举属性。",[202,4334,4336],{"className":204,"code":4335,"language":206,"meta":207,"style":207},"const obj = { name: \"javascript\", age: 20 };\nObject.prototype.history = \"lang\";\n\nfor (const i in obj) {\n console.log(i, obj.hasOwnProperty(i));\n}\n\u002F\u002F name true\n\u002F\u002F age true\n\u002F\u002F history false\n",[192,4337,4338,4368,4390,4394,4415,4446,4451,4456,4461],{"__ignoreMap":207},[211,4339,4340,4342,4344,4346,4348,4350,4352,4354,4356,4358,4360,4362,4364,4366],{"class":213,"line":214},[211,4341,949],{"class":217},[211,4343,2109],{"class":221},[211,4345,226],{"class":225},[211,4347,2046],{"class":225},[211,4349,2741],{"class":2049},[211,4351,2053],{"class":225},[211,4353,2220],{"class":225},[211,4355,2748],{"class":354},[211,4357,351],{"class":225},[211,4359,791],{"class":225},[211,4361,2755],{"class":2049},[211,4363,2053],{"class":225},[211,4365,2760],{"class":229},[211,4367,2058],{"class":225},[211,4369,4370,4372,4374,4376,4378,4380,4382,4384,4386,4388],{"class":213,"line":236},[211,4371,2207],{"class":2503},[211,4373,242],{"class":225},[211,4375,2535],{"class":221},[211,4377,242],{"class":225},[211,4379,2775],{"class":221},[211,4381,226],{"class":225},[211,4383,2220],{"class":225},[211,4385,2782],{"class":354},[211,4387,351],{"class":225},[211,4389,233],{"class":225},[211,4391,4392],{"class":213,"line":259},[211,4393,263],{"emptyLinePlaceholder":262},[211,4395,4396,4398,4401,4403,4406,4409,4412],{"class":213,"line":266},[211,4397,3979],{"class":2636},[211,4399,4400],{"class":221}," (",[211,4402,949],{"class":217},[211,4404,4405],{"class":221}," i ",[211,4407,4408],{"class":225},"in",[211,4410,4411],{"class":221}," obj) ",[211,4413,4414],{"class":225},"{\n",[211,4416,4417,4419,4421,4423,4425,4428,4430,4432,4434,4437,4439,4441,4444],{"class":213,"line":279},[211,4418,3709],{"class":221},[211,4420,242],{"class":225},[211,4422,2144],{"class":245},[211,4424,348],{"class":2049},[211,4426,4427],{"class":221},"i",[211,4429,791],{"class":225},[211,4431,3731],{"class":221},[211,4433,242],{"class":225},[211,4435,4436],{"class":245},"hasOwnProperty",[211,4438,348],{"class":2049},[211,4440,4427],{"class":221},[211,4442,4443],{"class":2049},"))",[211,4445,233],{"class":225},[211,4447,4448],{"class":213,"line":295},[211,4449,4450],{"class":225},"}\n",[211,4452,4453],{"class":213,"line":300},[211,4454,4455],{"class":255},"\u002F\u002F name true\n",[211,4457,4458],{"class":213,"line":312},[211,4459,4460],{"class":255},"\u002F\u002F age true\n",[211,4462,4463],{"class":213,"line":328},[211,4464,4465],{"class":255},"\u002F\u002F history false\n",[396,4467,4469],{"id":4468},"forof","for...of",[386,4471,4473],{"to":4472},"https:\u002F\u002Fmdn.io\u002Fzh\u002Ffor...of","MDN: for...of",[179,4475,4476],{},[186,4477,4478,4481],{},[189,4479,4480],{},"可迭代对象（包括 Array，Map，Set，String，TypedArray，arguments 对象等等）上创建一个迭代循环；",[189,4482,4483],{},"语句可以使用 hasOwnProperty() 加一层过滤以达到 Object.keys() 的效果。",[174,4485,4486],{"id":4486},"数值数组去重",[4488,4489,4490,4493,4494,4497,4498,4497,4501,4497,4504,4497,4507,4497,4509,4511,4512,537],"warning",{},[192,4491,4492],{},"Set()"," 的成员值都是唯一的，可以过滤重复的 ",[192,4495,4496],{},"Number","、",[192,4499,4500],{},"String",[192,4502,4503],{},"Boolean",[192,4505,4506],{},"undefined",[192,4508,479],{},[192,4510,750],{},"， 无法过滤重复的 ",[192,4513,2207],{},[202,4515,4517],{"className":204,"code":4516,"language":206,"meta":207,"style":207},"const arr = [1, 2, 5, 3, 3, 1, 4, 9, 7, 1, 5];\n\nconsole.log([\n ...new Set([\n 1,\n 1,\n \"3\",\n \"3\",\n Number.NaN,\n Number.NaN,\n undefined,\n undefined,\n null,\n null,\n true,\n true,\n {},\n {},\n ]),\n]);\n\u002F\u002F [1, \"3\", NaN, undefined, null, true, {}, {}]\n",[192,4518,4519,4576,4580,4591,4601,4608,4614,4625,4635,4646,4656,4661,4665,4670,4674,4681,4687,4692,4696,4703,4709],{"__ignoreMap":207},[211,4520,4521,4523,4525,4527,4529,4531,4533,4535,4537,4539,4541,4543,4545,4547,4549,4551,4553,4555,4557,4560,4562,4564,4566,4568,4570,4572,4574],{"class":213,"line":214},[211,4522,949],{"class":217},[211,4524,952],{"class":221},[211,4526,226],{"class":225},[211,4528,957],{"class":221},[211,4530,615],{"class":229},[211,4532,791],{"class":225},[211,4534,806],{"class":229},[211,4536,791],{"class":225},[211,4538,821],{"class":229},[211,4540,791],{"class":225},[211,4542,811],{"class":229},[211,4544,791],{"class":225},[211,4546,811],{"class":229},[211,4548,791],{"class":225},[211,4550,801],{"class":229},[211,4552,791],{"class":225},[211,4554,816],{"class":229},[211,4556,791],{"class":225},[211,4558,4559],{"class":229}," 9",[211,4561,791],{"class":225},[211,4563,2890],{"class":229},[211,4565,791],{"class":225},[211,4567,801],{"class":229},[211,4569,791],{"class":225},[211,4571,821],{"class":229},[211,4573,988],{"class":221},[211,4575,233],{"class":225},[211,4577,4578],{"class":213,"line":236},[211,4579,263],{"emptyLinePlaceholder":262},[211,4581,4582,4584,4586,4588],{"class":213,"line":259},[211,4583,2139],{"class":221},[211,4585,242],{"class":225},[211,4587,2144],{"class":245},[211,4589,4590],{"class":221},"([\n",[211,4592,4593,4596,4599],{"class":213,"line":266},[211,4594,4595],{"class":225}," ...new",[211,4597,4598],{"class":245}," Set",[211,4600,4590],{"class":221},[211,4602,4603,4606],{"class":213,"line":279},[211,4604,4605],{"class":229}," 1",[211,4607,2242],{"class":225},[211,4609,4610,4612],{"class":213,"line":295},[211,4611,4605],{"class":229},[211,4613,2242],{"class":225},[211,4615,4616,4619,4621,4623],{"class":213,"line":300},[211,4617,4618],{"class":225}," \"",[211,4620,788],{"class":354},[211,4622,351],{"class":225},[211,4624,2242],{"class":225},[211,4626,4627,4629,4631,4633],{"class":213,"line":312},[211,4628,4618],{"class":225},[211,4630,788],{"class":354},[211,4632,351],{"class":225},[211,4634,2242],{"class":225},[211,4636,4637,4640,4642,4644],{"class":213,"line":328},[211,4638,4639],{"class":221}," Number",[211,4641,242],{"class":225},[211,4643,750],{"class":221},[211,4645,2242],{"class":225},[211,4647,4648,4650,4652,4654],{"class":213,"line":333},[211,4649,4639],{"class":221},[211,4651,242],{"class":225},[211,4653,750],{"class":221},[211,4655,2242],{"class":225},[211,4657,4658],{"class":213,"line":339},[211,4659,4660],{"class":225}," undefined,\n",[211,4662,4663],{"class":213,"line":1967},[211,4664,4660],{"class":225},[211,4666,4667],{"class":213,"line":1978},[211,4668,4669],{"class":225}," 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= {};\n return this.reduce((result, next) => {\n temp[next[key]] ? \"\" : (temp[next[key]] = true) && result.push(next);\n return result;\n }, []);\n};\nobjArr.uniqueArr(\"id\");\n",[192,5395,5396,5424,5454,5466,5491,5553,5561,5569,5574],{"__ignoreMap":207},[211,5397,5398,5400,5402,5404,5406,5409,5412,5415,5417,5420,5422],{"class":213,"line":214},[211,5399,4760],{"class":2503},[211,5401,242],{"class":225},[211,5403,2535],{"class":221},[211,5405,242],{"class":225},[211,5407,5408],{"class":245},"uniqueArr",[211,5410,5411],{"class":225}," =",[211,5413,5414],{"class":217}," function",[211,5416,4400],{"class":225},[211,5418,5419],{"class":2658},"key",[211,5421,360],{"class":225},[211,5423,2229],{"class":225},[211,5425,5426,5429,5431,5434,5436,5438,5441,5443,5446,5449,5452],{"class":213,"line":236},[211,5427,5428],{"class":2636}," 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next",[211,5486,360],{"class":225},[211,5488,3702],{"class":217},[211,5490,2229],{"class":225},[211,5492,5493,5496,5498,5501,5503,5505,5508,5510,5512,5514,5516,5519,5521,5523,5525,5527,5529,5531,5533,5535,5538,5540,5542,5545,5547,5549,5551],{"class":213,"line":279},[211,5494,5495],{"class":221}," temp",[211,5497,3734],{"class":2049},[211,5499,5500],{"class":221},"next",[211,5502,3734],{"class":2049},[211,5504,5419],{"class":221},[211,5506,5507],{"class":2049},"]] ",[211,5509,5090],{"class":225},[211,5511,871],{"class":225},[211,5513,5095],{"class":225},[211,5515,4400],{"class":2049},[211,5517,5518],{"class":221},"temp",[211,5520,3734],{"class":2049},[211,5522,5500],{"class":221},[211,5524,3734],{"class":2049},[211,5526,5419],{"class":221},[211,5528,5507],{"class":2049},[211,5530,226],{"class":225},[211,5532,2252],{"class":876},[211,5534,4985],{"class":2049},[211,5536,5537],{"class":225},"&&",[211,5539,5076],{"class":221},[211,5541,242],{"class":225},[211,5543,5544],{"class":245},"push",[211,5546,348],{"class":2049},[211,5548,5500],{"class":221},[211,5550,360],{"class":2049},[211,5552,233],{"class":225},[211,5554,5555,5557,5559],{"class":213,"line":295},[211,5556,5073],{"class":2636},[211,5558,5076],{"class":221},[211,5560,233],{"class":225},[211,5562,5563,5565,5567],{"class":213,"line":300},[211,5564,5114],{"class":225},[211,5566,3297],{"class":2049},[211,5568,233],{"class":225},[211,5570,5571],{"class":213,"line":312},[211,5572,5573],{"class":225},"};\n",[211,5575,5576,5579,5581,5583,5585,5587,5590,5592,5594],{"class":213,"line":328},[211,5577,5578],{"class":221},"objArr",[211,5580,242],{"class":225},[211,5582,5408],{"class":245},[211,5584,348],{"class":221},[211,5586,351],{"class":225},[211,5588,5589],{"class":354},"id",[211,5591,351],{"class":225},[211,5593,360],{"class":221},[211,5595,233],{"class":225},[396,5597,4717,5599,4913,5601,5603,5604],{"id":5598},"通过-arrayprototypefilter-和-setmap",[192,5600,4912],{},[192,5602,4492],{},"\u002F",[192,5605,5606],{},"Map()",[202,5608,5610],{"className":204,"code":5609,"language":206,"meta":207,"style":207},"Array.prototype.uniqueArr = function (key) {\n if (!Array.isArray(this)) return;\n const set = new Set();\n return this.filter((item) => {\n return !set.has(item[key]) && set.add(item[key]);\n });\n \u002F\u002F let map = new Map();\n \u002F\u002F return this.filter(item=>{\n \u002F\u002F return !map.has(item[key]) && map.set(item[key], 1);\n \u002F\u002F })\n};\nobjArr.uniqueArr(\"id\");\n",[192,5611,5612,5636,5660,5678,5698,5745,5754,5759,5764,5769,5774,5778],{"__ignoreMap":207},[211,5613,5614,5616,5618,5620,5622,5624,5626,5628,5630,5632,5634],{"class":213,"line":214},[211,5615,4760],{"class":2503},[211,5617,242],{"class":225},[211,5619,2535],{"class":221},[211,5621,242],{"class":225},[211,5623,5408],{"class":245},[211,5625,5411],{"class":225},[211,5627,5414],{"class":217},[211,5629,4400],{"class":225},[211,5631,5419],{"class":2658},[211,5633,360],{"class":225},[211,5635,2229],{"class":225},[211,5637,5638,5640,5642,5644,5646,5648,5650,5652,5654,5656,5658],{"class":213,"line":236},[211,5639,5428],{"class":2636},[211,5641,4400],{"class":2049},[211,5643,5433],{"class":225},[211,5645,4760],{"class":221},[211,5647,242],{"class":225},[211,5649,5440],{"class":245},[211,5651,348],{"class":2049},[211,5653,5445],{"class":225},[211,5655,5448],{"class":2049},[211,5657,5451],{"class":2636},[211,5659,233],{"class":225},[211,5661,5662,5664,5667,5669,5672,5674,5676],{"class":213,"line":259},[211,5663,5458],{"class":217},[211,5665,5666],{"class":221}," set",[211,5668,5411],{"class":225},[211,5670,5671],{"class":225}," new",[211,5673,4598],{"class":245},[211,5675,249],{"class":2049},[211,5677,233],{"class":225},[211,5679,5680,5682,5684,5686,5688,5690,5692,5694,5696],{"class":213,"line":266},[211,5681,4943],{"class":2636},[211,5683,3831],{"class":225},[211,5685,4951],{"class":245},[211,5687,348],{"class":2049},[211,5689,348],{"class":225},[211,5691,4958],{"class":2658},[211,5693,360],{"class":225},[211,5695,3702],{"class":217},[211,5697,2229],{"class":225},[211,5699,5700,5702,5705,5708,5710,5713,5715,5717,5719,5721,5724,5726,5728,5730,5733,5735,5737,5739,5741,5743],{"class":213,"line":279},[211,5701,5073],{"class":2636},[211,5703,5704],{"class":225}," !",[211,5706,5707],{"class":221},"set",[211,5709,242],{"class":225},[211,5711,5712],{"class":245},"has",[211,5714,348],{"class":2049},[211,5716,4958],{"class":221},[211,5718,3734],{"class":2049},[211,5720,5419],{"class":221},[211,5722,5723],{"class":2049},"]) ",[211,5725,5537],{"class":225},[211,5727,5666],{"class":221},[211,5729,242],{"class":225},[211,5731,5732],{"class":245},"add",[211,5734,348],{"class":2049},[211,5736,4958],{"class":221},[211,5738,3734],{"class":2049},[211,5740,5419],{"class":221},[211,5742,2844],{"class":2049},[211,5744,233],{"class":225},[211,5746,5747,5750,5752],{"class":213,"line":295},[211,5748,5749],{"class":225}," }",[211,5751,360],{"class":2049},[211,5753,233],{"class":225},[211,5755,5756],{"class":213,"line":300},[211,5757,5758],{"class":255}," \u002F\u002F let map = new Map();\n",[211,5760,5761],{"class":213,"line":312},[211,5762,5763],{"class":255}," \u002F\u002F return this.filter(item=>{\n",[211,5765,5766],{"class":213,"line":328},[211,5767,5768],{"class":255}," \u002F\u002F return !map.has(item[key]) && map.set(item[key], 1);\n",[211,5770,5771],{"class":213,"line":333},[211,5772,5773],{"class":255}," \u002F\u002F })\n",[211,5775,5776],{"class":213,"line":339},[211,5777,5573],{"class":225},[211,5779,5780,5782,5784,5786,5788,5790,5792,5794,5796],{"class":213,"line":1967},[211,5781,5578],{"class":221},[211,5783,242],{"class":225},[211,5785,5408],{"class":245},[211,5787,348],{"class":221},[211,5789,351],{"class":225},[211,5791,5589],{"class":354},[211,5793,351],{"class":225},[211,5795,360],{"class":221},[211,5797,233],{"class":225},[174,5799,5800],{"id":5800},"数组扁平化",[386,5802,5803,4913,5806,5809],{},[192,5804,5805],{},"Array.prototype.join()",[192,5807,5808],{},"Array.prototype.toString()"," 都可以将多维数组转成普通字符串。",[202,5811,5813],{"className":204,"code":5812,"language":206,"meta":207,"style":207},"const arr = [1, [2, 3], [4, 5]];\narr.join(); \u002F\u002F '1,2,3,4,5'\narr.toString(); \u002F\u002F '1,2,3,4,5'\n",[192,5814,5815,5854,5871],{"__ignoreMap":207},[211,5816,5817,5819,5821,5823,5825,5827,5829,5831,5833,5835,5837,5839,5841,5843,5845,5847,5849,5852],{"class":213,"line":214},[211,5818,949],{"class":217},[211,5820,952],{"class":221},[211,5822,226],{"class":225},[211,5824,957],{"class":221},[211,5826,615],{"class":229},[211,5828,791],{"class":225},[211,5830,957],{"class":221},[211,5832,459],{"class":229},[211,5834,791],{"class":225},[211,5836,811],{"class":229},[211,5838,988],{"class":221},[211,5840,791],{"class":225},[211,5842,957],{"class":221},[211,5844,1383],{"class":229},[211,5846,791],{"class":225},[211,5848,821],{"class":229},[211,5850,5851],{"class":221},"]]",[211,5853,233],{"class":225},[211,5855,5856,5859,5861,5864,5866,5868],{"class":213,"line":236},[211,5857,5858],{"class":221},"arr",[211,5860,242],{"class":225},[211,5862,5863],{"class":245},"join",[211,5865,249],{"class":221},[211,5867,252],{"class":225},[211,5869,5870],{"class":255}," \u002F\u002F '1,2,3,4,5'\n",[211,5872,5873,5875,5877,5880,5882,5884],{"class":213,"line":259},[211,5874,5858],{"class":221},[211,5876,242],{"class":225},[211,5878,5879],{"class":245},"toString",[211,5881,249],{"class":221},[211,5883,252],{"class":225},[211,5885,5870],{"class":255},[396,5887,4717,5889,4720],{"id":5888},"通过-arrayprototypeconcat-和-扩展运算符",[192,5890,5891],{},"Array.prototype.concat()",[202,5893,5895],{"className":204,"code":5894,"language":206,"meta":207,"style":207},"const arr = [1, [2, 3], [4, 5]];\n[].concat(...arr);\n\u002F\u002F [1, 2, 3, 4, 5]\n",[192,5896,5897,5935,5952],{"__ignoreMap":207},[211,5898,5899,5901,5903,5905,5907,5909,5911,5913,5915,5917,5919,5921,5923,5925,5927,5929,5931,5933],{"class":213,"line":214},[211,5900,949],{"class":217},[211,5902,952],{"class":221},[211,5904,226],{"class":225},[211,5906,957],{"class":221},[211,5908,615],{"class":229},[211,5910,791],{"class":225},[211,5912,957],{"class":221},[211,5914,459],{"class":229},[211,5916,791],{"class":225},[211,5918,811],{"class":229},[211,5920,988],{"class":221},[211,5922,791],{"class":225},[211,5924,957],{"class":221},[211,5926,1383],{"class":229},[211,5928,791],{"class":225},[211,5930,821],{"class":229},[211,5932,5851],{"class":221},[211,5934,233],{"class":225},[211,5936,5937,5940,5942,5944,5946,5948,5950],{"class":213,"line":236},[211,5938,5939],{"class":221},"[]",[211,5941,242],{"class":225},[211,5943,4282],{"class":245},[211,5945,348],{"class":221},[211,5947,1028],{"class":225},[211,5949,1031],{"class":221},[211,5951,233],{"class":225},[211,5953,5954],{"class":213,"line":259},[211,5955,5956],{"class":255},"\u002F\u002F [1, 2, 3, 4, 5]\n",[396,5958,4717,5960,5603,5962,4913,5964],{"id":5959},"通过-arrayprototypejoinarrayprototypetostring-和-stringprototypesplit",[192,5961,5805],{},[192,5963,5808],{},[192,5965,5966],{},"String.prototype.split()",[202,5968,5970],{"className":204,"code":5969,"language":206,"meta":207,"style":207},"const arr = [1, [2, 3], [4, 5], [6, [7, 8, [9, 10]]]];\narr.join().split(\",\").map(Number);\narr.toString().split(\",\").map(Number);\n\u002F\u002F [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]\n",[192,5971,5972,6040,6075,6107],{"__ignoreMap":207},[211,5973,5974,5976,5978,5980,5982,5984,5986,5988,5990,5992,5994,5996,5998,6000,6002,6004,6006,6008,6010,6012,6015,6017,6019,6021,6023,6025,6027,6029,6031,6033,6035,6038],{"class":213,"line":214},[211,5975,949],{"class":217},[211,5977,952],{"class":221},[211,5979,226],{"class":225},[211,5981,957],{"class":221},[211,5983,615],{"class":229},[211,5985,791],{"class":225},[211,5987,957],{"class":221},[211,5989,459],{"class":229},[211,5991,791],{"class":225},[211,5993,811],{"class":229},[211,5995,988],{"class":221},[211,5997,791],{"class":225},[211,5999,957],{"class":221},[211,6001,1383],{"class":229},[211,6003,791],{"class":225},[211,6005,821],{"class":229},[211,6007,988],{"class":221},[211,6009,791],{"class":225},[211,6011,957],{"class":221},[211,6013,6014],{"class":229},"6",[211,6016,791],{"class":225},[211,6018,957],{"class":221},[211,6020,1435],{"class":229},[211,6022,791],{"class":225},[211,6024,5289],{"class":229},[211,6026,791],{"class":225},[211,6028,957],{"class":221},[211,6030,1647],{"class":229},[211,6032,791],{"class":225},[211,6034,1350],{"class":229},[211,6036,6037],{"class":221},"]]]]",[211,6039,233],{"class":225},[211,6041,6042,6044,6046,6048,6050,6052,6055,6057,6059,6061,6063,6065,6067,6070,6073],{"class":213,"line":236},[211,6043,5858],{"class":221},[211,6045,242],{"class":225},[211,6047,5863],{"class":245},[211,6049,249],{"class":221},[211,6051,242],{"class":225},[211,6053,6054],{"class":245},"split",[211,6056,348],{"class":221},[211,6058,351],{"class":225},[211,6060,791],{"class":354},[211,6062,351],{"class":225},[211,6064,360],{"class":221},[211,6066,242],{"class":225},[211,6068,6069],{"class":245},"map",[211,6071,6072],{"class":221},"(Number)",[211,6074,233],{"class":225},[211,6076,6077,6079,6081,6083,6085,6087,6089,6091,6093,6095,6097,6099,6101,6103,6105],{"class":213,"line":259},[211,6078,5858],{"class":221},[211,6080,242],{"class":225},[211,6082,5879],{"class":245},[211,6084,249],{"class":221},[211,6086,242],{"class":225},[211,6088,6054],{"class":245},[211,6090,348],{"class":221},[211,6092,351],{"class":225},[211,6094,791],{"class":354},[211,6096,351],{"class":225},[211,6098,360],{"class":221},[211,6100,242],{"class":225},[211,6102,6069],{"class":245},[211,6104,6072],{"class":221},[211,6106,233],{"class":225},[211,6108,6109],{"class":213,"line":266},[211,6110,6111],{"class":255},"\u002F\u002F [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]\n",[174,6113,4717,6115],{"id":6114},"通过-arrayprototypeflat",[192,6116,6117],{},"Array.prototype.flat()",[202,6119,6121],{"className":204,"code":6120,"language":206,"meta":207,"style":207},"const arr = [1, [2, 3], [4, 5], [6, [7, 8, [9, 10]]]];\narr.flat(); \u002F\u002F [1, 2, 3, 4, 5, 6, [7, 8, [9, 10]]]\narr.flat(2); \u002F\u002F [1, 2, 3, 4, 5, 6, 7, 8, [9, 10]]\narr.flat(Infinity); \u002F\u002F [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]\n",[192,6122,6123,6189,6205,6224],{"__ignoreMap":207},[211,6124,6125,6127,6129,6131,6133,6135,6137,6139,6141,6143,6145,6147,6149,6151,6153,6155,6157,6159,6161,6163,6165,6167,6169,6171,6173,6175,6177,6179,6181,6183,6185,6187],{"class":213,"line":214},[211,6126,949],{"class":217},[211,6128,952],{"class":221},[211,6130,226],{"class":225},[211,6132,957],{"class":221},[211,6134,615],{"class":229},[211,6136,791],{"class":225},[211,6138,957],{"class":221},[211,6140,459],{"class":229},[211,6142,791],{"class":225},[211,6144,811],{"class":229},[211,6146,988],{"class":221},[211,6148,791],{"class":225},[211,6150,957],{"class":221},[211,6152,1383],{"class":229},[211,6154,791],{"class":225},[211,6156,821],{"class":229},[211,6158,988],{"class":221},[211,6160,791],{"class":225},[211,6162,957],{"class":221},[211,6164,6014],{"class":229},[211,6166,791],{"class":225},[211,6168,957],{"class":221},[211,6170,1435],{"class":229},[211,6172,791],{"class":225},[211,6174,5289],{"class":229},[211,6176,791],{"class":225},[211,6178,957],{"class":221},[211,6180,1647],{"class":229},[211,6182,791],{"class":225},[211,6184,1350],{"class":229},[211,6186,6037],{"class":221},[211,6188,233],{"class":225},[211,6190,6191,6193,6195,6198,6200,6202],{"class":213,"line":236},[211,6192,5858],{"class":221},[211,6194,242],{"class":225},[211,6196,6197],{"class":245},"flat",[211,6199,249],{"class":221},[211,6201,252],{"class":225},[211,6203,6204],{"class":255}," 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