{"id":158966,"date":"2024-05-08T13:00:49","date_gmt":"2024-05-08T05:00:49","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/158966.html"},"modified":"2024-05-08T13:00:54","modified_gmt":"2024-05-08T05:00:54","slug":"%e5%a6%82%e4%bd%95%e5%b0%86%e4%b8%80%e4%b8%aa-javascript-%e6%95%b0%e7%bb%84%e6%89%93%e4%b9%b1%e9%a1%ba%e5%ba%8f","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/158966.html","title":{"rendered":"\u5982\u4f55\u5c06\u4e00\u4e2a JavaScript \u6570\u7ec4\u6253\u4e71\u987a\u5e8f"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/26221503\/fae42fc9-249f-400a-a773-f767c640a27b.webp\" alt=\"\u5982\u4f55\u5c06\u4e00\u4e2a JavaScript \u6570\u7ec4\u6253\u4e71\u987a\u5e8f\" \/><\/p>\n<p><p>\u5c06\u4e00\u4e2aJavaScript\u6570\u7ec4\u6253\u4e71\u987a\u5e8f\uff0c\u6700\u5e38\u7528\u4e14\u9ad8\u6548\u7684\u65b9\u6cd5\u6709<strong>\u4f7f\u7528 Fisher-Yates \u7b97\u6cd5<\/strong>\u3001<strong>\u4f7f\u7528 sort() \u65b9\u6cd5\u7ed3\u5408 Math.random()<\/strong>\u3002\u8fd9\u91cc\uff0c\u7279\u522b\u63a8\u8350<strong>\u4f7f\u7528 Fisher-Yates \u7b97\u6cd5<\/strong>\uff0c\u56e0\u4e3a\u5b83\u4e0d\u4ec5\u6548\u7387\u9ad8\uff0c\u800c\u4e14\u80fd\u591f\u786e\u4fdd\u6570\u7ec4\u5143\u7d20\u7684\u968f\u673a\u6027\u3002Fisher-Yates \u7b97\u6cd5\uff0c\u4e5f\u79f0\u4f5c\u6d17\u724c\u7b97\u6cd5\uff0c\u901a\u8fc7\u904d\u5386\u6570\u7ec4\u5143\u7d20\uff0c\u5e76\u4e0e\u5176\u5b83\u968f\u673a\u9009\u4e2d\u7684\u5143\u7d20\u4ea4\u6362\u4f4d\u7f6e\u6765\u5b9e\u73b0\u6570\u7ec4\u7684\u968f\u673a\u6392\u5e8f\u3002\u8fd9\u79cd\u65b9\u6cd5\u7684\u4f18\u70b9\u662f\u80fd\u591f\u786e\u4fdd\u6bcf\u4e2a\u5143\u7d20\u90fd\u6709\u673a\u4f1a\u51fa\u73b0\u5728\u6570\u7ec4\u7684\u4efb\u4f55\u4f4d\u7f6e\uff0c\u800c\u4e14\u6bcf\u79cd\u6392\u5217\u90fd\u662f\u7b49\u53ef\u80fd\u7684\uff0c\u8fd9\u5bf9\u4e8e\u9700\u8981\u516c\u5e73\u3001\u65e0\u504f\u7684\u968f\u673a\u7ed3\u679c\u975e\u5e38\u91cd\u8981\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001FISHER-YATES \u7b97\u6cd5\u5b9e\u73b0<\/h3>\n<\/p>\n<p><p>Fisher-Yates \u7b97\u6cd5\u662f\u5b9e\u73b0\u6570\u7ec4\u968f\u673a\u6392\u5e8f\u7684\u9ec4\u91d1\u6807\u51c6\u3002\u5176\u7b97\u6cd5\u8fc7\u7a0b\u7b80\u5355\u660e\u4e86\uff0c\u9996\u5148\u4ece\u6570\u7ec4\u7684\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u5f00\u59cb\uff0c\u5c06\u5176\u4e0e\u4e00\u4e2a\u968f\u673a\u4f4d\u7f6e\u7684\u5143\u7d20\u4ea4\u6362\uff0c\u7136\u540e\u79fb\u81f3\u524d\u4e00\u4e2a\u5143\u7d20\uff0c\u5bf9\u5269\u4e0b\u7684\u5143\u7d20\u91cd\u590d\u8fd9\u4e2a\u8fc7\u7a0b\uff0c\u76f4\u81f3\u5230\u8fbe\u6570\u7ec4\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u3002\u8fd9\u4e2a\u7b97\u6cd5\u7684\u5b9e\u73b0\u4fdd\u8bc1\u4e86\u6bcf\u4e2a\u5143\u7d20\u968f\u673a\u4e14\u516c\u6b63\u5730\u88ab\u5206\u914d\u5230\u4efb\u4f55\u4f4d\u7f6e\uff0c\u907f\u514d\u4e86\u67d0\u4e9b\u4f4d\u7f6e\u88ab\u9891\u7e41\u9009\u62e9\u7684\u504f\u5dee\u3002<\/p>\n<\/p>\n<p><p>\u9996\u5148\uff0c\u5b9e\u73b0\u8be5\u7b97\u6cd5\u9700\u8981\u4e00\u4e2a\u5faa\u73af\uff0c\u4ece\u6570\u7ec4\u7684\u672b\u5c3e\u5f00\u59cb\u5411\u6570\u7ec4\u7684\u5f00\u5934\u904d\u5386\u3002\u5728\u6bcf\u4e00\u6b21\u8fed\u4ee3\u4e2d\uff0c\u901a\u8fc7<code>Math.random()<\/code>\u51fd\u6570\u751f\u6210\u4e00\u4e2a\u968f\u673a\u7d22\u5f15\uff0c\u7136\u540e\u5c06\u5f53\u524d\u8fed\u4ee3\u7684\u5143\u7d20\u4e0e\u8fd9\u4e2a\u968f\u673a\u7d22\u5f15\u6240\u6307\u5411\u7684\u5143\u7d20\u4ea4\u6362\u4f4d\u7f6e\u3002\u8fd9\u6837\u4e0d\u65ad\u91cd\u590d\uff0c\u76f4\u5230\u904d\u5386\u5b8c\u6574\u4e2a\u6570\u7ec4\uff0c\u6700\u7ec8\u5f97\u5230\u4e00\u4e2a\u5b8c\u5168\u6253\u4e71\u987a\u5e8f\u7684\u6570\u7ec4\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u3001SORT() \u65b9\u6cd5\u4e0e MATH.RANDOM()<\/h3>\n<\/p>\n<p><p>\u867d\u7136\u4e0d\u63a8\u8350\u4f7f\u7528<code>sort()<\/code>\u7ed3\u5408<code>Math.random()<\/code>\u6765\u6253\u4e71\u6570\u7ec4\uff0c\u539f\u56e0\u662f\u8fd9\u79cd\u65b9\u6cd5\u4ea7\u751f\u7684\u968f\u673a\u6027\u5e76\u4e0d\u7406\u60f3\uff0c\u4f46\u5b83\u4ecd\u7136\u662f\u4e00\u79cd\u5728\u7b80\u5355\u573a\u666f\u4e0b\u5feb\u901f\u5b9e\u73b0\u6570\u7ec4\u968f\u673a\u6392\u5e8f\u7684\u65b9\u6cd5\u3002\u901a\u8fc7\u4f20\u9012\u4e00\u4e2a\u51fd\u6570\u7ed9<code>sort()<\/code>\u65b9\u6cd5\uff0c\u6b64\u51fd\u6570\u5185\u90e8\u901a\u8fc7\u8fd4\u56de<code>Math.random() - 0.5<\/code>\u6765\u51b3\u5b9a\u5143\u7d20\u95f4\u7684\u6392\u5e8f\u5173\u7cfb\uff0c\u53ef\u4ee5\u8fbe\u5230\u6253\u4e71\u6570\u7ec4\u7684\u76ee\u7684\u3002<\/p>\n<\/p>\n<p><p>\u5b9e\u73b0\u8fd9\u4e2a\u65b9\u6cd5\u9700\u8981\u6ce8\u610f\uff0c\u7531\u4e8e<code>Math.random()<\/code>\u51fd\u6570\u8fd4\u56de\u4e00\u4e2a0\u52301\u4e4b\u95f4\u7684\u968f\u673a\u6570\uff0c\u51cf\u53bb0.5\u7684\u7ed3\u679c\u6709\u53ef\u80fd\u662f\u6b63\u6570\u3001\u8d1f\u6570\u6216\u96f6\uff0c\u8fd9\u5c06\u968f\u673a\u51b3\u5b9a\u6570\u7ec4\u5143\u7d20\u95f4\u7684\u6392\u5e8f\u65b9\u5f0f\u3002\u7136\u800c\uff0c\u8fd9\u79cd\u65b9\u6cd5\u7684\u968f\u673a\u6027\u4e0d\u591f\u5747\u5300\uff0c\u5c24\u5176\u662f\u5728\u6570\u7ec4\u8f83\u5927\u65f6\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u67d0\u4e9b\u6392\u5e8f\u7ed3\u679c\u51fa\u73b0\u7684\u9891\u7387\u9ad8\u4e8e\u5176\u4ed6\u3002<\/p>\n<\/p>\n<p><h3>\u4e09\u3001\u5b9e\u9645\u5e94\u7528\u573a\u666f<\/h3>\n<\/p>\n<p><p>\u5728\u7406\u89e3\u4e86\u5982\u4f55\u6253\u4e71\u4e00\u4e2aJavaScript\u6570\u7ec4\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u8fd9\u4e9b\u6280\u672f\u5e94\u7528\u5728\u591a\u79cd\u573a\u666f\u4e2d\uff0c\u6bd4\u5982\u5728\u7ebf\u8003\u8bd5\u7684\u9898\u76ee\u987a\u5e8f\u3001\u6e38\u620f\u4e2d\u7269\u54c1\u7684\u968f\u673a\u5206\u914d\u3001\u6216\u8005\u662f\u5728\u5c55\u793a\u5217\u8868\u65f6\u589e\u52a0\u5185\u5bb9\u7684\u591a\u6837\u6027\u3002\u5229\u7528\u597d\u8fd9\u4e9b\u6570\u7ec4\u64cd\u4f5c\u6280\u672f\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u8f7b\u677e\u5b9e\u73b0\u529f\u80fd\u4e30\u5bcc\u3001\u7528\u6237\u4f53\u9a8c\u826f\u597d\u7684Web\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n<\/p>\n<p><p>\u5e94\u7528\u8fd9\u4e9b\u6280\u672f\u65f6\uff0c\u9700\u8981\u8003\u8651\u5b9e\u9645\u7684\u573a\u666f\u9700\u6c42\u3002\u6bd4\u5982\uff0c\u5728\u9700\u8981\u9ad8\u5ea6\u968f\u673a\u6027\u7684\u573a\u666f\u4e0b\uff0c\u5e94\u4f18\u5148\u8003\u8651\u4f7f\u7528Fisher-Yates\u7b97\u6cd5\uff1b\u800c\u5728\u4e00\u4e9b\u5bf9\u968f\u673a\u6027\u8981\u6c42\u4e0d\u9ad8\u7684\u8f7b\u91cf\u7ea7\u5e94\u7528\u4e2d\uff0c\u4f7f\u7528<code>sort()<\/code>\u65b9\u6cd5\u7ed3\u5408<code>Math.random()<\/code>\u53ef\u80fd\u66f4\u4e3a\u7b80\u4fbf\u3002<\/p>\n<\/p>\n<p><h3>\u56db\u3001\u6027\u80fd\u548c\u6548\u7387\u7684\u8003\u91cf<\/h3>\n<\/p>\n<p><p>\u5728\u6253\u4e71\u5927\u578b\u6570\u7ec4\u65f6\uff0c\u6027\u80fd\u548c\u6548\u7387\u5c24\u5176\u91cd\u8981\u3002Fisher-Yates\u7b97\u6cd5\u5728\u8fd9\u65b9\u9762\u8868\u73b0\u51fa\u8272\uff0c\u56e0\u4e3a\u5b83\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(n)\uff0c\u610f\u5473\u7740\u5904\u7406\u65f6\u95f4\u968f\u7740\u6570\u7ec4\u5927\u5c0f\u7ebf\u6027\u589e\u957f\uff0c\u9002\u5408\u5904\u7406\u5927\u578b\u6570\u7ec4\u3002\u76f8\u6bd4\u4e4b\u4e0b\uff0c<code>sort()<\/code>\u65b9\u6cd5\u867d\u7136\u7b80\u5355\uff0c\u4f46\u7531\u4e8e\u5176\u80cc\u540e\u590d\u6742\u7684\u6392\u5e8f\u673a\u5236\uff0c\u53ef\u80fd\u4f1a\u5728\u5904\u7406\u5927\u578b\u6570\u7ec4\u65f6\u4ea7\u751f\u8f83\u9ad8\u7684\u6027\u80fd\u5f00\u9500\u3002<\/p>\n<\/p>\n<p><p>\u56e0\u6b64\uff0c\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u65f6\uff0c\u9664\u4e86\u8003\u8651\u6253\u4e71\u7684\u968f\u673a\u6027\u5916\uff0c\u4e5f\u9700\u8981\u8003\u8651\u5b9e\u9645\u5904\u7406\u7684\u6570\u7ec4\u5927\u5c0f\u548c\u6027\u80fd\u8981\u6c42\u3002\u9002\u65f6\u9009\u62e9\u6700\u4f18\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u786e\u4fdd\u5e94\u7528\u7a0b\u5e8f\u7684\u9ad8\u6548\u8fd0\u884c\uff0c\u540c\u65f6\u8fbe\u5230\u9884\u671f\u7684\u6253\u4e71\u6548\u679c\u3002<\/p>\n<\/p>\n<p><p>\u6253\u4e71JavaScript\u6570\u7ec4\uff0c\u65e0\u8bba\u662f\u4e3a\u4e86\u589e\u5f3a\u5e94\u7528\u7684\u4ea4\u4e92\u6027\u3001\u6539\u5584\u7528\u6237\u4f53\u9a8c\u8fd8\u662f\u7b80\u5355\u5730\u5b9e\u73b0\u6570\u636e\u7684\u968f\u673a\u5c55\u793a\uff0c\u90fd\u662f\u4e00\u4e2a\u65e2\u5b9e\u7528\u53c8\u6709\u8da3\u7684\u8bdd\u9898\u3002\u901a\u8fc7\u7cbe\u9009\u7684\u65b9\u6cd5\u548c\u7b97\u6cd5\uff0c\u53ef\u4ee5\u9ad8\u6548\u4e14\u516c\u6b63\u5730\u5b9e\u73b0\u8fd9\u4e00\u9700\u6c42\uff0c\u4e3a\u73b0\u4ee3Web\u5f00\u53d1\u5e26\u6765\u66f4\u591a\u53ef\u80fd\u6027\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>\u5982\u4f55\u4f7f\u7528 JavaScript \u5c06\u6570\u7ec4\u987a\u5e8f\u968f\u673a\u6253\u4e71\uff1f<\/strong><\/p>\n<p>\u53ef\u4ee5\u4f7f\u7528 Fisher-Yates \u7b97\u6cd5\u6765\u5c06 JavaScript \u6570\u7ec4\u968f\u673a\u6253\u4e71\u987a\u5e8f\u3002\u8be5\u7b97\u6cd5\u901a\u8fc7\u904d\u5386\u6570\u7ec4\u5e76\u5c06\u6bcf\u4e2a\u5143\u7d20\u4e0e\u968f\u673a\u7d22\u5f15\u5904\u7684\u5143\u7d20\u8fdb\u884c\u4ea4\u6362\u6765\u5b9e\u73b0\u968f\u673a\u91cd\u6392\u5e8f\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<pre><code class=\"language-javascript\">function shuffleArray(arr) {\n  for (let i = arr.length - 1; i &gt; 0; i--) {\n    const randomIndex = Math.floor(Math.random() * (i + 1));\n    [arr[i], arr[randomIndex]] = [arr[randomIndex], arr[i]];\n  }\n  return arr;\n}\n\nconst myArray = [1, 2, 3, 4, 5];\nconst shuffledArray = shuffleArray(myArray);\nconsole.log(shuffledArray);\n<\/code><\/pre>\n<p><strong>\u5982\u4f55\u4f7f\u7528 JavaScript \u5c06\u6570\u7ec4\u5143\u7d20\u987a\u5e8f\u968f\u673a\u5316\uff1f<\/strong><\/p>\n<p>\u5982\u679c\u4f60\u60f3\u8981\u4e00\u4e2a\u4e0d\u6539\u53d8\u539f\u59cb\u6570\u7ec4\u7684\u65b9\u6cd5\uff0c\u5728 JavaScript \u4e2d\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\u5c06\u6570\u7ec4\u5143\u7d20\u987a\u5e8f\u968f\u673a\u5316\uff1a<\/p>\n<pre><code class=\"language-javascript\">function randomizeArray(arr) {\n  const newArr = arr.slice(); \/\/ \u521b\u5efa\u539f\u59cb\u6570\u7ec4\u7684\u526f\u672c\n  for (let i = newArr.length - 1; i &gt; 0; i--) {\n    const randomIndex = Math.floor(Math.random() * (i + 1));\n    [newArr[i], newArr[randomIndex]] = [newArr[randomIndex], newArr[i]];\n  }\n  return newArr;\n}\n\nconst myArray = [1, 2, 3, 4, 5];\nconst randomizedArray = randomizeArray(myArray);\nconsole.log(randomizedArray);\n<\/code><\/pre>\n<p><strong>\u6709\u54ea\u4e9b\u5176\u4ed6\u65b9\u6cd5\u53ef\u4ee5\u4f7f\u7528 JavaScript \u5c06\u6570\u7ec4\u987a\u5e8f\u6253\u4e71\uff1f<\/strong><\/p>\n<p>\u9664\u4e86 Fisher-Yates \u7b97\u6cd5\uff0c\u8fd8\u6709\u5176\u4ed6\u65b9\u6cd5\u53ef\u4ee5\u7528\u6765\u968f\u673a\u6253\u4e71 JavaScript \u6570\u7ec4\u7684\u987a\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u7528 Math.random() \u65b9\u6cd5\u751f\u6210\u968f\u673a\u6570\uff0c\u5e76\u4f7f\u7528 sort() \u65b9\u6cd5\u5bf9\u6570\u7ec4\u8fdb\u884c\u6392\u5e8f\uff0c\u4ece\u800c\u5b9e\u73b0\u968f\u673a\u6253\u4e71\u3002<\/p>\n<pre><code class=\"language-javascript\">function shuffleArray(arr) {\n  return arr.sort(() =&gt; Math.random() - 0.5);\n}\n\nconst myArray = [1, 2, 3, 4, 5];\nconst shuffledArray = shuffleArray(myArray);\nconsole.log(shuffledArray);\n<\/code><\/pre>\n<p>\u8bf7\u6ce8\u610f\uff0c\u8fd9\u79cd\u65b9\u6cd5\u53ef\u80fd\u4e0d\u591f\u968f\u673a\uff0c\u5e76\u4e14\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u53ef\u80fd\u51fa\u73b0\u95ee\u9898\u3002\u4f7f\u7528 Fisher-Yates \u7b97\u6cd5\u662f\u66f4\u5b89\u5168\u548c\u53ef\u9760\u7684\u9009\u62e9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5c06\u4e00\u4e2aJavaScript\u6570\u7ec4\u6253\u4e71\u987a\u5e8f\uff0c\u6700\u5e38\u7528\u4e14\u9ad8\u6548\u7684\u65b9\u6cd5\u6709\u4f7f\u7528 Fisher-Yates \u7b97\u6cd5\u3001\u4f7f\u7528 sor [&hellip;]","protected":false},"author":3,"featured_media":158975,"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\/158966"}],"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=158966"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/158966\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/158975"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=158966"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=158966"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=158966"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}