{"id":169527,"date":"2024-05-08T16:47:35","date_gmt":"2024-05-08T08:47:35","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/169527.html"},"modified":"2024-05-08T16:47:40","modified_gmt":"2024-05-08T08:47:40","slug":"javascript-%e8%83%bd%e9%80%9a%e8%bf%87%e7%b1%bb%e5%88%9b%e5%bb%ba%e5%af%b9%e8%b1%a1%e6%95%b0%e7%bb%84","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/169527.html","title":{"rendered":"JavaScript \u80fd\u901a\u8fc7\u7c7b\u521b\u5efa\u5bf9\u8c61\u6570\u7ec4"},"content":{"rendered":"

\"JavaScript<\/p>\n

\u662f\u7684\uff0cJavaScript \u901a\u8fc7\u7c7b\u53ef\u4ee5\u521b\u5efa\u5bf9\u8c61\u6570\u7ec4\u3002\u8fd9\u79cd\u65b9\u6cd5\u5728\u7ec4\u7ec7\u548c\u7ba1\u7406\u5177\u6709\u76f8\u4f3c\u5c5e\u6027\u4f46\u4e0d\u540c\u6570\u636e\u7684\u591a\u4e2a\u5bf9\u8c61\u65f6\u975e\u5e38\u6709\u6548\uff0c\u4e3b\u8981\u4f53\u73b0\u5728\u4e09\u4e2a\u65b9\u9762\uff1a\u4ee3\u7801\u7684\u91cd\u7528\u6027\u63d0\u9ad8\u3001\u6570\u636e\u7ed3\u6784\u7684\u4e00\u81f4\u6027\u3001\u4ee5\u53ca\u65b9\u4fbf\u7684\u6570\u636e\u64cd\u4f5c\u4e0e\u7ef4\u62a4\u3002<\/strong> \u5176\u4e2d\uff0c\u4ee3\u7801\u7684\u91cd\u7528\u6027\u63d0\u9ad8<\/strong>\u662f\u6700\u76f4\u63a5\u7684\u597d\u5904\u3002\u901a\u8fc7\u7c7b\u6765\u5b9a\u4e49\u5bf9\u8c61\u7684\u6a21\u677f\uff0c\u53ef\u4ee5\u4f7f\u5f97\u521b\u5efa\u5177\u6709\u76f8\u540c\u5c5e\u6027\u548c\u65b9\u6cd5\u7684\u5bf9\u8c61\u53d8\u5f97\u66f4\u52a0\u7b80\u5355\u548c\u9ad8\u6548\u3002\u8fd9\u610f\u5473\u7740\uff0c\u5bf9\u4e8e\u9700\u8981\u521b\u5efa\u591a\u4e2a\u7ed3\u6784\u76f8\u4f3c\u7684\u5bf9\u8c61\u65f6\uff0c\u53ea\u9700\u5b9a\u4e49\u4e00\u6b21\u7c7b\uff0c\u7136\u540e\u53ef\u4ee5\u91cd\u590d\u5229\u7528\u8fd9\u4e2a\u7c7b\u6765\u521b\u5efa\u591a\u4e2a\u5bf9\u8c61\u5b9e\u4f8b\uff0c\u5927\u5927\u51cf\u5c11\u4e86\u4ee3\u7801\u7684\u91cd\u590d\u7f16\u5199\u91cf\uff0c\u63d0\u9ad8\u4e86\u5f00\u53d1\u6548\u7387\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u521b\u5efa\u7c7b\u548c\u5bf9\u8c61\u6570\u7ec4\u7684\u57fa\u672c\u6982\u5ff5<\/h3>\n<\/p>\n

\u5728JavaScript\u4e2d\uff0c\u7c7b\u662f\u4e00\u4e2a\u7279\u6b8a\u7684\u51fd\u6570\uff0c\u5b83\u5b9a\u4e49\u4e86\u5bf9\u8c61\u7684\u84dd\u56fe\u6216\u539f\u578b\u3002\u901a\u8fc7\u7c7b\uff0c\u53ef\u4ee5\u521b\u5efa\u5177\u6709\u7279\u5b9a\u521d\u59cb\u5c5e\u6027\u548c\u65b9\u6cd5\u7684\u5bf9\u8c61\u5b9e\u4f8b\u3002<\/p>\n<\/p>\n

    \n
  • \u521b\u5efa\u7c7b\uff1a\u9996\u5148\uff0c\u9700\u8981\u5b9a\u4e49\u4e00\u4e2a\u7c7b\u3002\u7c7b\u5b9a\u4e49\u901a\u5e38\u4ee5class<\/code>\u5173\u952e\u5b57\u5f00\u59cb\uff0c\u5e76\u9075\u5faa\u7279\u5b9a\u7684\u8bed\u6cd5\u7ed3\u6784\u3002\u7c7b\u4e2d\u53ef\u4ee5\u5305\u542b\u6784\u9020\u51fd\u6570constructor<\/code>\uff0c\u5b83\u662f\u5728\u521b\u5efa\u5bf9\u8c61\u5b9e\u4f8b\u65f6\u81ea\u52a8\u8c03\u7528\u7684\u51fd\u6570\uff0c\u7528\u4e8e\u521d\u59cb\u5316\u5bf9\u8c61\u7684\u5c5e\u6027\u3002<\/li>\n
  • \u521b\u5efa\u5bf9\u8c61\u5b9e\u4f8b\uff1a\u4f7f\u7528new<\/code>\u5173\u952e\u5b57\u914d\u5408\u7c7b\u540d\uff0c\u53ef\u4ee5\u6839\u636e\u7c7b\u7684\u5b9a\u4e49\u521b\u5efa\u51fa\u5bf9\u8c61\u7684\u5b9e\u4f8b\u3002\u8fd9\u4e9b\u5b9e\u4f8b\u5c06\u7ee7\u627f\u7c7b\u4e2d\u5b9a\u4e49\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n

    \u4e8c\u3001\u5229\u7528\u7c7b\u521b\u5efa\u5bf9\u8c61\u6570\u7ec4<\/h3>\n<\/p>\n

    \u521b\u5efa\u5bf9\u8c61\u6570\u7ec4\u7684\u6b65\u9aa4\u5206\u4e3a\u4e24\u90e8\u5206\uff1a\u9996\u5148\uff0c\u5b9a\u4e49\u4e00\u4e2a\u7c7b\u6765\u6307\u5b9a\u5bf9\u8c61\u7684\u7ed3\u6784\uff1b\u5176\u6b21\uff0c\u4f7f\u7528\u8be5\u7c7b\u521b\u5efa\u5bf9\u8c61\u5b9e\u4f8b\uff0c\u5e76\u5c06\u8fd9\u4e9b\u5b9e\u4f8b\u5b58\u50a8\u5230\u4e00\u4e2a\u6570\u7ec4\u4e2d\u3002<\/p>\n<\/p>\n

      \n
    • \n

      \u5b9a\u4e49\u7c7b\uff1a\u5b9a\u4e49\u4e00\u4e2a\u7c7b\uff0c\u6307\u5b9a\u5bf9\u8c61\u5e94\u8be5\u5177\u6709\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002<\/p>\n<\/p>\n

      class Person {<\/p>\n
        constructor(name, age) {<\/p>\n
          this.name = name;<\/p>\n
          this.age = age;<\/p>\n
        }<\/p>\n
      }<\/p>\n
      <\/code><\/pre>\n<\/p>\n<\/li>\n
    • \n
      \u521b\u5efa\u5bf9\u8c61\u6570\u7ec4\uff1a\u63a5\u7740\uff0c\u5229\u7528\u5faa\u73af\u6216\u5176\u4ed6\u903b\u8f91\uff0c\u521b\u5efa\u591a\u4e2aPerson<\/code>\u7c7b\u7684\u5b9e\u4f8b\uff0c\u5e76\u5c06\u8fd9\u4e9b\u5b9e\u4f8b\u6dfb\u52a0\u5230\u6570\u7ec4\u4e2d\u3002<\/p>\n<\/p>\n
      let people = [];<\/p>\n
      for(let i = 0; i < 5; i++) {<\/p>\n
        people.push(new Person(`Person ${i}`, 20+i));<\/p>\n
      }<\/p>\n
      <\/code><\/pre>\n<\/p>\n<\/li>\n<\/ul>\n
      \u4e09\u3001\u7ba1\u7406\u548c\u64cd\u4f5c\u5bf9\u8c61\u6570\u7ec4<\/h3>\n<\/p>\n
      \u5bf9\u8c61\u6570\u7ec4\u521b\u5efa\u4e4b\u540e\uff0c\u5c31\u53ef\u4ee5\u901a\u8fc7\u6570\u7ec4\u7684\u65b9\u6cd5\u5bf9\u5176\u4e2d\u7684\u5bf9\u8c61\u8fdb\u884c\u7ba1\u7406\u548c\u64cd\u4f5c\u4e86\u3002<\/p>\n<\/p>\n
        \n
      • \n
        \u8bbf\u95ee\u5bf9\u8c61\u5c5e\u6027\uff1a\u53ef\u4ee5\u901a\u8fc7\u904d\u5386\u6570\u7ec4\uff0c\u5e76\u8bbf\u95ee\u6bcf\u4e2a\u5bf9\u8c61\u5b9e\u4f8b\u7684\u5c5e\u6027\u3002<\/p>\n<\/p>\n
        people.forEach(person => console.log(person.name));<\/p>\n
        <\/code><\/pre>\n<\/p>\n<\/li>\n
      • \n
        \u66f4\u65b0\u5bf9\u8c61\u5c5e\u6027\uff1a\u540c\u6837\uff0c\u53ef\u4ee5\u4fee\u6539\u5bf9\u8c61\u6570\u7ec4\u4e2d\u7684\u5bf9\u8c61\u5c5e\u6027\u3002<\/p>\n<\/p>\n
        people[0].name = 'Updated Name';<\/p>\n
        <\/code><\/pre>\n<\/p>\n<\/li>\n<\/ul>\n
        \u56db\u3001\u5e94\u7528\u4e3e\u4f8b<\/h3>\n<\/p>\n
        \u5728\u8bb8\u591a\u5e94\u7528\u573a\u666f\u4e2d\uff0c\u5229\u7528\u7c7b\u521b\u5efa\u5bf9\u8c61\u6570\u7ec4\u90fd\u975e\u5e38\u6709\u7528\u3002\u4f8b\u5982\uff0c\u5047\u8bbe\u60a8\u6b63\u5728\u5f00\u53d1\u4e00\u4e2a\u7b80\u5355\u7684\u5b66\u751f\u7ba1\u7406\u7cfb\u7edf\uff0c\u5176\u4e2d\u9700\u8981\u5904\u7406\u8bb8\u591a\u5b66\u751f\u7684\u4fe1\u606f\u3002<\/p>\n<\/p>\n
          \n
        • \u5b9a\u4e49\u5b66\u751f\u7c7b\uff1a\u9996\u5148\u5b9a\u4e49\u4e00\u4e2aStudent<\/code>\u7c7b\uff0c\u5305\u62ec\u5b66\u751f\u7684\u59d3\u540d\u3001\u5e74\u9f84\u3001\u73ed\u7ea7\u7b49\u5c5e\u6027\u3002<\/li>\n
        • \u521b\u5efa\u5b66\u751f\u5bf9\u8c61\u6570\u7ec4\uff1a\u7136\u540e\u6839\u636e\u5b9e\u9645\u9700\u8981\uff0c\u521b\u5efa\u4efb\u610f\u6570\u91cf\u7684\u5b66\u751f\u5bf9\u8c61\uff0c\u5e76\u5c06\u5b83\u4eec\u5b58\u50a8\u5728\u4e00\u4e2a\u6570\u7ec4\u4e2d\u3002<\/li>\n<\/ul>\n
          \u8fd9\u79cd\u65b9\u5f0f\u4e0d\u4ec5\u4f7f\u5f97\u4ee3\u7801\u7ed3\u6784\u6e05\u6670\uff0c\u800c\u4e14\u4fbf\u4e8e\u7ef4\u62a4\u548c\u6269\u5c55\u3002<\/p>\n<\/p>\n
          \u4e94\u3001\u6700\u4f73\u5b9e\u8df5\u548c\u6027\u80fd\u8003\u8651<\/h3>\n<\/p>\n
          \u867d\u7136\u4f7f\u7528\u7c7b\u548c\u5bf9\u8c61\u6570\u7ec4\u5728\u8bb8\u591a\u60c5\u51b5\u4e0b\u90fd\u6781\u5176\u65b9\u4fbf\u4e0e\u5f3a\u5927\uff0c\u4f46\u4e5f\u6709\u4e00\u4e9b\u6700\u4f73\u5b9e\u8df5\u548c\u6027\u80fd\u8003\u8651\u3002<\/p>\n<\/p>\n
            \n
          • \u5185\u5b58\u7ba1\u7406\uff1a\u521b\u5efa\u5927\u91cf\u5bf9\u8c61\u65f6\u8981\u6ce8\u610f\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\uff0c\u907f\u514d\u9020\u6210\u5185\u5b58\u6cc4\u6f0f\u3002<\/li>\n
          • \u4ee3\u7801\u4f18\u5316\uff1a\u5408\u7406\u5229\u7528\u73b0\u4ee3JavaScript\u7684\u7279\u6027\uff0c\u5982\u6269\u5c55\u8fd0\u7b97\u7b26\uff08…\uff09\u548c\u89e3\u6784\u8d4b\u503c\uff0c\u4ee5\u7b80\u5316\u4ee3\u7801\u548c\u63d0\u9ad8\u6548\u7387\u3002<\/li>\n<\/ul>\n
            \u603b\u4e4b\uff0c\u901a\u8fc7\u7c7b\u521b\u5efa\u5bf9\u8c61\u6570\u7ec4\u662fJavaScript\u4e2d\u4e00\u79cd\u975e\u5e38\u5f3a\u5927\u7684\u529f\u80fd\uff0c\u5b83\u8ba9\u6570\u636e\u7ba1\u7406\u53d8\u5f97\u66f4\u4e3a\u9ad8\u6548\u548c\u7cfb\u7edf\u5316\u3002\u4e0d\u8fc7\uff0c\u5728\u5b9e\u9645\u5e94\u7528\u65f6\uff0c\u4e5f\u9700\u8981\u8003\u8651\u5230\u6027\u80fd\u548c\u5185\u5b58\u7b49\u56e0\u7d20\uff0c\u505a\u5230\u5408\u7406\u4f18\u5316\u3002<\/p>\n<\/p>\n
            \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
            \u5982\u4f55\u4f7f\u7528JavaScript\u521b\u5efa\u5bf9\u8c61\u6570\u7ec4\uff1f<\/strong><\/p>\n
            \u5728JavaScript\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u5b9a\u4e49\u7c7b\uff08\u6216\u6784\u9020\u51fd\u6570\uff09\u6765\u521b\u5efa\u5bf9\u8c61\u6570\u7ec4\u3002\u9996\u5148\uff0c\u5728JavaScript\u4e2d\u521b\u5efa\u4e00\u4e2a\u7c7b\uff0c\u53ef\u4ee5\u4f7f\u7528class<\/code>\u5173\u952e\u5b57\u6216\u8005\u6784\u9020\u51fd\u6570\u3002\u7136\u540e\uff0c\u4f7f\u7528\u7c7b\u6765\u5b9a\u4e49\u5bf9\u8c61\u7684\u7ed3\u6784\u548c\u5c5e\u6027\u3002\u6700\u540e\uff0c\u901a\u8fc7\u5b9e\u4f8b\u5316\u7c7b\u6765\u521b\u5efa\u5bf9\u8c61\u5e76\u5c06\u5b83\u4eec\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002<\/p>\n
            \u4f8b\u5982\uff0c\u6211\u8be5\u5982\u4f55\u521b\u5efa\u4e00\u4e2a\u5b58\u50a8\u5b66\u751f\u4fe1\u606f\u7684\u5bf9\u8c61\u6570\u7ec4\uff1f<\/strong><\/p>\n
            \u9996\u5148\uff0c\u53ef\u4ee5\u4f7f\u7528class<\/code>\u5173\u952e\u5b57\u521b\u5efa\u4e00\u4e2a\u540d\u4e3aStudent<\/code>\u7684\u7c7b\uff0c\u5176\u4e2d\u5305\u542b\u5b66\u751f\u7684\u59d3\u540d\u548c\u5e74\u9f84\u5c5e\u6027\u3002\u5176\u6b21\uff0c\u521b\u5efa\u4e00\u4e2a\u7a7a\u6570\u7ec4students<\/code>\u6765\u5b58\u50a8\u5b66\u751f\u4fe1\u606f\u3002\u7136\u540e\uff0c\u901a\u8fc7\u5b9e\u4f8b\u5316Student<\/code>\u7c7b\u6765\u521b\u5efa\u591a\u4e2a\u5b66\u751f\u5bf9\u8c61\uff0c\u5e76\u5c06\u5b83\u4eec\u4f9d\u6b21\u6dfb\u52a0\u5230students<\/code>\u6570\u7ec4\u4e2d\u3002<\/p>\n
            \u5982\u4f55\u904d\u5386\u548c\u8bbf\u95eeJavaScript\u5bf9\u8c61\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\uff1f<\/strong><\/p>\n
            \u901a\u8fc7\u4f7f\u7528\u5faa\u73af\u7ed3\u6784\uff08\u5982for<\/code>\u5faa\u73af\u6216forEach<\/code>\u65b9\u6cd5\uff09\uff0c\u53ef\u4ee5\u904d\u5386\u548c\u8bbf\u95eeJavaScript\u5bf9\u8c61\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u3002\u9996\u5148\uff0c\u4f7f\u7528for<\/code>\u5faa\u73af\u53ef\u4ee5\u8fed\u4ee3\u6570\u7ec4\u7684\u7d22\u5f15\uff0c\u5e76\u4f7f\u7528\u7d22\u5f15\u6765\u8bbf\u95ee\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u3002\u5176\u6b21\uff0c\u4f7f\u7528forEach<\/code>\u65b9\u6cd5\u53ef\u4ee5\u66f4\u7b80\u6d01\u5730\u904d\u5386\u6570\u7ec4\uff0c\u5e76\u901a\u8fc7\u56de\u8c03\u51fd\u6570\u8bbf\u95ee\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u3002<\/p>\n
            \u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528for<\/code>\u5faa\u73af\u904d\u5386\u5b66\u751f\u6570\u7ec4\uff0c\u5e76\u6253\u5370\u6bcf\u4e2a\u5b66\u751f\u7684\u59d3\u540d\u548c\u5e74\u9f84\uff1a<\/p>\n
            for (let i = 0; i < students.length; i++) {\n  console.log("\u59d3\u540d\uff1a" + students[i].name + "\uff0c\u5e74\u9f84\uff1a" + students[i].age);\n}\n<\/code><\/pre>\n
            \u6216\u8005\uff0c\u53ef\u4ee5\u4f7f\u7528forEach<\/code>\u65b9\u6cd5\u6765\u5b9e\u73b0\u76f8\u540c\u7684\u7ed3\u679c\uff1a<\/p>\n
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