{"id":155215,"date":"2024-05-08T11:48:31","date_gmt":"2024-05-08T03:48:31","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/155215.html"},"modified":"2024-05-08T11:48:36","modified_gmt":"2024-05-08T03:48:36","slug":"%e7%a7%bb%e5%8a%a8%e7%ab%af-javascript-%e4%bb%a3%e7%a0%81%e4%b8%ad%e6%80%8e%e4%b9%88%e5%ae%9e%e7%8e%b0%e6%95%b0%e7%bb%84%e9%81%8d%e5%8e%86","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/155215.html","title":{"rendered":"\u79fb\u52a8\u7aef JavaScript \u4ee3\u7801\u4e2d\u600e\u4e48\u5b9e\u73b0\u6570\u7ec4\u904d\u5386"},"content":{"rendered":"

\"\u79fb\u52a8\u7aef<\/p>\n

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forEach<\/code>\u65b9\u6cd5\u63a5\u53d7\u4e00\u4e2a\u56de\u8c03\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\uff0c\u8be5\u51fd\u6570\u9488\u5bf9\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u6267\u884c\u4e00\u6b21\u64cd\u4f5c\u3002\u8fd9\u79cd\u65b9\u6cd5\u7684\u4e00\u4e2a\u4e3b\u8981\u4f18\u52bf\u662f\u5b83\u7b80\u5316\u4e86\u4ee3\u7801\uff0c\u5e76\u4e14\u6613\u4e8e\u7406\u89e3\uff0c\u7279\u522b\u662f\u5bf9\u4e8e\u6267\u884c\u590d\u6742\u903b\u8f91\u7684\u573a\u666f\u3002\u6b64\u5916\uff0cforEach<\/code>\u63d0\u4f9b\u4e86\u5bf9\u5f53\u524d\u5143\u7d20\u7684\u7d22\u5f15\u548c\u6574\u4e2a\u6570\u7ec4\u7684\u5f15\u7528\uff0c\u589e\u52a0\u4e86\u5176\u7075\u6d3b\u6027\u548c\u5e94\u7528\u573a\u666f\u3002<\/p>\n<\/p>\n

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    \n
  • \u57fa\u672c\u4f7f\u7528<\/strong>\uff1a\u901a\u8fc7\u8bbe\u7f6e\u7d22\u5f15\u503c\uff0c\u589e\u91cf\u4ee5\u53ca\u5faa\u73af\u7ed3\u675f\u7684\u6761\u4ef6\uff0cfor<\/code>\u5faa\u73af\u80fd\u591f\u9010\u4e2a\u8bbf\u95ee\u6570\u7ec4\u7684\u6bcf\u4e2a\u5143\u7d20\u3002<\/li>\n
  • \u9ad8\u7ea7\u5e94\u7528<\/strong>\uff1a\u5728\u9700\u8981\u66f4\u590d\u6742\u7684\u6761\u4ef6\u5224\u65ad\u6216\u8005\u5728\u5faa\u73af\u8fc7\u7a0b\u4e2d\u9700\u8981\u8c03\u6574\u7d22\u5f15\u589e\u91cf\u65f6\uff0cfor<\/code>\u5faa\u73af\u63d0\u4f9b\u4e86\u6781\u9ad8\u7684\u7075\u6d3b\u6027\u3002<\/li>\n<\/ul>\n

    \u4e8c\u3001FOREACH\u65b9\u6cd5<\/h3>\n<\/p>\n

    forEach<\/code>\u65b9\u6cd5\u662fArray\u539f\u578b\u4e0a\u7684\u4e00\u4e2a\u65b9\u6cd5\uff0c\u5b83\u4e3a\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u6267\u884c\u4e00\u6b21\u63d0\u4f9b\u7684\u51fd\u6570\u3002\u8fd9\u79cd\u65b9\u6cd5\u4e0d\u6539\u53d8\u539f\u6570\u7ec4\u3002<\/p>\n<\/p>\n

      \n
    • \u57fa\u672c\u4f7f\u7528<\/strong>\uff1aforEach<\/code>\u901a\u8fc7\u56de\u8c03\u51fd\u6570\u8bbf\u95ee\u6bcf\u4e2a\u5143\u7d20\u548c\u5176\u7d22\u5f15\uff0c\u7b80\u5316\u4e86\u904d\u5386\u8fc7\u7a0b\u3002<\/li>\n
    • \u56de\u8c03\u51fd\u6570\u53c2\u6570<\/strong>\uff1a\u56de\u8c03\u51fd\u6570\u53ef\u4ee5\u63a5\u53d7\u4e09\u4e2a\u53c2\u6570\uff1a\u5f53\u524d\u5143\u7d20\u3001\u5f53\u524d\u5143\u7d20\u7684\u7d22\u5f15\u3001\u4ee5\u53ca\u88ab\u904d\u5386\u7684\u6570\u7ec4\u3002<\/li>\n<\/ul>\n

      \u4e09\u3001FOR…OF\u5faa\u73af<\/h3>\n<\/p>\n

      for...of<\/code>\u5faa\u73af\u662fES6\u65b0\u589e\u7684\u4e00\u4e2a\u904d\u5386\u65b9\u6cd5\uff0c\u5b83\u53ef\u4ee5\u76f4\u63a5\u83b7\u53d6\u6570\u7ec4\u7684\u503c\uff0c\u800c\u4e0d\u662f\u7d22\u5f15\uff0c\u7b80\u5316\u4e86\u904d\u5386\u5199\u6cd5\u3002<\/p>\n<\/p>\n

        \n
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        \u56db\u3001MAP\u65b9\u6cd5<\/h3>\n<\/p>\n

        map<\/code>\u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u7ed3\u679c\u662f\u8be5\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u662f\u8c03\u7528\u4e00\u6b21\u63d0\u4f9b\u7684\u51fd\u6570\u540e\u7684\u8fd4\u56de\u503c\u3002<\/p>\n<\/p>\n

          \n
        • \u57fa\u672c\u4f7f\u7528<\/strong>\uff1amap<\/code>\u65b9\u6cd5\u9002\u7528\u4e8e\u9700\u8981\u5c06\u539f\u6570\u7ec4\u6620\u5c04\u5230\u4e00\u4e2a\u65b0\u6570\u7ec4\u7684\u60c5\u51b5\uff0c\u6bcf\u4e2a\u5143\u7d20\u53ef\u4ee5\u7ecf\u8fc7\u51fd\u6570\u5904\u7406\u540e\u653e\u5165\u65b0\u6570\u7ec4\u3002<\/li>\n
        • \u533a\u522b\u4e8eforEach<\/code><\/strong>\uff1a\u6700\u5927\u7684\u4e0d\u540c\u5728\u4e8emap<\/code>\u4f1a\u8fd4\u56de\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u4e0d\u4f1a\u6539\u53d8\u539f\u6709\u7684\u6570\u7ec4\uff0c\u800cforEach<\/code>\u6ca1\u6709\u8fd4\u56de\u503c\u3002<\/li>\n<\/ul>\n

          \u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\u4e3b\u8981\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u5e94\u7528\u573a\u666f\u548c\u5f00\u53d1\u8005\u7684\u504f\u597d\u3002\u5bf9\u4e8e\u7b80\u5355\u7684\u904d\u5386\u9700\u6c42\uff0cfor<\/code>\u5faa\u73af\u548cforEach<\/code>\u53ef\u80fd\u662f\u66f4\u76f4\u63a5\u7684\u9009\u62e9\u3002\u5f53\u9700\u8981\u4fee\u6539\u539f\u6570\u7ec4\u65f6\uff0cmap<\/code>\u65b9\u6cd5\u63d0\u4f9b\u4e86\u4e00\u4e2a\u4f18\u96c5\u7684\u89e3\u51b3\u65b9\u6848\u3002\u800cfor...of<\/code>\u5faa\u73af\u56e0\u5176\u7b80\u6d01\u7684\u8bed\u6cd5\u6210\u4e3a\u4e86\u904d\u5386\u6570\u7ec4\u7684\u53e6\u4e00\u4e2a\u4f18\u9009\u65b9\u6cd5\u3002\u4e86\u89e3\u548c\u638c\u63e1\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u5c06\u6709\u52a9\u4e8e\u7f16\u5199\u66f4\u9ad8\u6548\u3001\u66f4\u5bb9\u6613\u7406\u89e3\u7684JavaScript\u4ee3\u7801\u3002<\/p>\n<\/p>\n

          \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n

          \u5982\u4f55\u5728\u79fb\u52a8\u7aef JavaScript \u4ee3\u7801\u4e2d\u8fdb\u884c\u6570\u7ec4\u904d\u5386\u64cd\u4f5c\uff1f<\/strong><\/p>\n

            \n
          1. \n

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          2. \n

            \u4f7f\u7528forEach\u65b9\u6cd5\u5b9e\u73b0\u6570\u7ec4\u904d\u5386<\/strong>\uff1aJavaScript\u4e2d\u7684\u6570\u7ec4\u5bf9\u8c61\u63d0\u4f9b\u4e86\u4e00\u4e2aforEach\u65b9\u6cd5\uff0c\u53ef\u4ee5\u66f4\u65b9\u4fbf\u5730\u8fdb\u884c\u6570\u7ec4\u904d\u5386\u64cd\u4f5c\u3002\u53ea\u9700\u8981\u8c03\u7528\u6570\u7ec4\u5bf9\u8c61\u7684forEach\u65b9\u6cd5\uff0c\u5e76\u4f20\u5165\u4e00\u4e2a\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\uff0c\u8be5\u51fd\u6570\u5c06\u4f1a\u5728\u904d\u5386\u6570\u7ec4\u7684\u8fc7\u7a0b\u4e2d\u88ab\u8c03\u7528\uff0c\u53ef\u4ee5\u5728\u51fd\u6570\u5185\u90e8\u5bf9\u6570\u7ec4\u5143\u7d20\u8fdb\u884c\u64cd\u4f5c\u3002<\/p>\n<\/li>\n

          3. \n

            \u4f7f\u7528map\u65b9\u6cd5\u5b9e\u73b0\u6570\u7ec4\u904d\u5386\u548c\u8f6c\u6362<\/strong>\uff1a\u9664\u4e86forEach\u65b9\u6cd5\uff0cJavaScript\u4e2d\u7684\u6570\u7ec4\u5bf9\u8c61\u8fd8\u63d0\u4f9b\u4e86map\u65b9\u6cd5\uff0c\u53ef\u4ee5\u7528\u4e8e\u6570\u7ec4\u904d\u5386\u4ee5\u53ca\u5bf9\u6570\u7ec4\u5143\u7d20\u8fdb\u884c\u8f6c\u6362\u3002map\u65b9\u6cd5\u4f1a\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\uff0c\u8be5\u6570\u7ec4\u5305\u542b\u4e86\u5bf9\u539f\u6570\u7ec4\u7ecf\u8fc7\u6307\u5b9a\u64cd\u4f5c\u540e\u7684\u7ed3\u679c\u3002\u5728\u79fb\u52a8\u7aef JavaScript \u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u5229\u7528map\u65b9\u6cd5\u6765\u5b9e\u73b0\u6570\u7ec4\u904d\u5386\u5e76\u5bf9\u5143\u7d20\u8fdb\u884c\u64cd\u4f5c\u6216\u8f6c\u6362\u3002<\/p>\n<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"\u5728\u79fb\u52a8\u7aefJavaScript\u4ee3\u7801\u4e2d\u5b9e\u73b0\u6570\u7ec4\u904d\u5386\u7684\u5e38\u7528\u65b9\u6cd5\u6709for\u5faa\u73af\u3001forEach\u65b9\u6cd5\u3001for…of\u5faa\u73af […]","protected":false},"author":3,"featured_media":155219,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/155215"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=155215"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/155215\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/155219"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=155215"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=155215"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=155215"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}