{"id":168529,"date":"2024-05-08T16:25:54","date_gmt":"2024-05-08T08:25:54","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/168529.html"},"modified":"2024-05-08T16:26:00","modified_gmt":"2024-05-08T08:26:00","slug":"javascript-%e5%8e%9f%e7%94%9f%e6%95%b0%e7%bb%84-array-%e7%9a%84%e5%b8%b8%e7%94%a8%e6%96%b9%e6%b3%95%e6%9c%89%e5%93%aa%e4%ba%9b","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/168529.html","title":{"rendered":"JavaScript \u539f\u751f\u6570\u7ec4 Array \u7684\u5e38\u7528\u65b9\u6cd5\u6709\u54ea\u4e9b"},"content":{"rendered":"

\"JavaScript<\/p>\n

JavaScript\u7684\u539f\u751f\u6570\u7ec4\uff08Array\uff09\u63d0\u4f9b\u4e30\u5bcc\u7684\u65b9\u6cd5\u6765\u5e2e\u52a9\u5f00\u53d1\u8005\u64cd\u4f5c\u6570\u7ec4\u6570\u636e\uff0c\u5305\u62ec\u4f46\u4e0d\u9650\u4e8e\u6dfb\u52a0\u3001\u5220\u9664\u3001\u904d\u5386\u3001\u6392\u5e8f\u548c\u641c\u7d22\u7b49\u529f\u80fd\u3002\u5e38\u7528\u7684Array\u65b9\u6cd5\u5305\u62ecpush()<\/code>\u3001pop()<\/code>\u3001shift()<\/code>\u3001unshift()<\/code>\u3001forEach()<\/code>\u3001map()<\/code>\u3001filter()<\/code>\u3001reduce()<\/code>\u3001slice()<\/code>\u3001splice()<\/code>\u3001find()<\/code>\u3001indexOf()<\/code>\u3001sort()<\/code>\u3001concat()<\/code> \u548c join()<\/code>\u7b49\u3002\u8fd9\u4e9b\u65b9\u6cd5\u6781\u5927\u5730\u65b9\u4fbf\u4e86\u6570\u7ec4\u7684\u5904\u7406\u4e0e\u6570\u636e\u7ed3\u6784\u7684\u5b9e\u73b0\u3002\u4ee5forEach()<\/code>\u65b9\u6cd5\u4e3a\u4f8b\uff0c\u8be5\u65b9\u6cd5\u904d\u5386\u6570\u7ec4\u7684\u6bcf\u4e2a\u5143\u7d20\uff0c\u5e76\u5bf9\u6bcf\u4e2a\u5143\u7d20\u6267\u884c\u63d0\u4f9b\u7684\u51fd\u6570\uff0c\u8fd9\u4f7f\u5f97\u6211\u4eec\u80fd\u591f\u8f7b\u6613\u5730\u5bf9\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u8fdb\u884c\u64cd\u4f5c\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u6dfb\u52a0\u4e0e\u5220\u9664\u5143\u7d20\u7684\u65b9\u6cd5<\/h3>\n<\/p>\n

PUSH() \u548c POP()<\/h4>\n<\/p>\n

push()<\/code> \u65b9\u6cd5\u7528\u4e8e\u5c06\u4e00\u4e2a\u6216\u591a\u4e2a\u5143\u7d20\u6dfb\u52a0\u5230\u6570\u7ec4\u7684\u672b\u5c3e\uff0c\u800c pop()<\/code> \u65b9\u6cd5\u5219\u7528\u4e8e\u79fb\u9664\u6570\u7ec4\u7684\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u3002\u4f7f\u7528 push()<\/code> \u65b9\u6cd5\u53ef\u4ee5\u65b9\u4fbf\u5730\u5728\u6570\u7ec4\u672b\u5c3e\u6dfb\u52a0\u5143\u7d20\uff0c\u800c pop()<\/code> \u65b9\u6cd5\u5219\u9002\u7528\u4e8e\u5b9e\u73b0\u6808\u7ed3\u6784\uff08\u540e\u8fdb\u5148\u51fa\uff09\u3002<\/p>\n<\/p>\n

UNSHIFT() \u548c SHIFT()<\/h4>\n<\/p>\n

\u4e0e push()<\/code> \u548c pop()<\/code> \u914d\u5bf9\u7684\u65b9\u6cd5\u662f unshift()<\/code> \u548c shift()<\/code>\u3002unshift()<\/code> \u65b9\u6cd5\u5c06\u4e00\u4e2a\u6216\u591a\u4e2a\u5143\u7d20\u6dfb\u52a0\u5230\u6570\u7ec4\u7684\u5f00\u59cb\uff0cshift()<\/code> \u65b9\u6cd5\u5219\u4ece\u6570\u7ec4\u4e2d\u5220\u9664\u7b2c\u4e00\u4e2a\u5143\u7d20\u3002unshift()<\/code> \u548c shift()<\/code> \u65b9\u6cd5\u901a\u5e38\u7528\u4e8e\u5b9e\u73b0\u961f\u5217\u7ed3\u6784\uff08\u5148\u8fdb\u5148\u51fa\uff09\u3002<\/p>\n<\/p>\n

\u4e8c\u3001\u904d\u5386\u4e0e\u6620\u5c04\u7684\u65b9\u6cd5<\/h3>\n<\/p>\n

FOREACH()<\/h4>\n<\/p>\n

forEach()<\/code> \u65b9\u6cd5\u4e3a\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u6267\u884c\u4e00\u6b21\u63d0\u4f9b\u7684\u51fd\u6570\uff0c\u662f\u904d\u5386\u6570\u7ec4\u7684\u4e00\u79cd\u5e38\u7528\u65b9\u5f0f\u3002\u5b83\u5141\u8bb8\u6211\u4eec\u5bf9\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u6267\u884c\u67d0\u79cd\u64cd\u4f5c\uff0c\u800c\u4e0d\u7528\u624b\u52a8\u7f16\u5199\u5faa\u73af\u4ee3\u7801\u3002<\/p>\n<\/p>\n

MAP()<\/h4>\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\u3002map()<\/code> \u662f\u4e00\u79cd\u5b9e\u73b0\u6570\u7ec4\u6620\u5c04\u7684\u5f3a\u5927\u5de5\u5177\uff0c\u5b83\u53ef\u4ee5\u7528\u4e8e\u8f6c\u6362\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u3002<\/p>\n<\/p>\n

\u4e09\u3001\u641c\u7d22\u4e0e\u7b5b\u9009\u7684\u65b9\u6cd5<\/h3>\n<\/p>\n

FILTER()<\/h4>\n<\/p>\n

filter()<\/code> \u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\uff0c\u5305\u542b\u901a\u8fc7\u6240\u63d0\u4f9b\u51fd\u6570\u5b9e\u73b0\u7684\u6d4b\u8bd5\u7684\u6240\u6709\u5143\u7d20\u3002\u8fd9\u5141\u8bb8\u6211\u4eec\u6839\u636e\u7279\u5b9a\u6761\u4ef6\u7b5b\u9009\u6570\u7ec4\uff0c\u53ea\u4fdd\u7559\u90a3\u4e9b\u6211\u4eec\u611f\u5174\u8da3\u7684\u5143\u7d20\u3002<\/p>\n<\/p>\n

FIND() \u548c INDEXOF()<\/h4>\n<\/p>\n

find()<\/code> \u65b9\u6cd5\u8fd4\u56de\u6570\u7ec4\u4e2d\u6ee1\u8db3\u63d0\u4f9b\u7684\u6d4b\u8bd5\u51fd\u6570\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u503c\u3002\u5982\u679c\u6ca1\u6709\u627e\u5230\u4efb\u4f55\u5143\u7d20\uff0c\u5219\u8fd4\u56de undefined<\/code>\u3002indexOf()<\/code> \u65b9\u6cd5\u8fd4\u56de\u5728\u6570\u7ec4\u4e2d\u53ef\u4ee5\u627e\u5230\u4e00\u4e2a\u7ed9\u5b9a\u5143\u7d20\u7684\u7b2c\u4e00\u4e2a\u7d22\u5f15\uff0c\u5982\u679c\u4e0d\u5b58\u5728\uff0c\u5219\u8fd4\u56de -1<\/code>\u3002\u8fd9\u4e24\u4e2a\u65b9\u6cd5\u90fd\u662f\u7528\u4e8e\u641c\u7d22\u6570\u7ec4\u5143\u7d20\u7684\u6709\u7528\u5de5\u5177\u3002<\/p>\n<\/p>\n

\u56db\u3001\u5176\u4ed6\u5b9e\u7528\u7684\u65b9\u6cd5<\/h3>\n<\/p>\n

REDUCE()<\/h4>\n<\/p>\n

reduce()<\/code> \u65b9\u6cd5\u5bf9\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u6267\u884c\u4e00\u4e2a reducer \u51fd\u6570\uff08\u4f60\u63d0\u4f9b\u7684\uff09\uff0c\u5c06\u5176\u7ed3\u679c\u6c47\u603b\u4e3a\u5355\u4e2a\u8fd4\u56de\u503c\u3002\u8fd9\u662f\u4e00\u4e2a\u975e\u5e38\u5f3a\u5927\u7684\u65b9\u6cd5\uff0c\u901a\u5e38\u7528\u4e8e\u5c06\u6570\u7ec4\u5143\u7d20\u7ec4\u5408\u8d77\u6765\uff0c\u6bd4\u5982\u8ba1\u7b97\u6570\u7ec4\u5143\u7d20\u7684\u603b\u548c\u6216\u4e58\u79ef\u3002<\/p>\n<\/p>\n

SLICE() \u548c SPLICE()<\/h4>\n<\/p>\n

slice()<\/code> \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\u5bf9\u8c61\uff0c\u8fd9\u4e00\u5bf9\u8c61\u662f\u4e00\u4e2a\u7531 begin<\/code> \u548c end<\/code> \u51b3\u5b9a\u7684\u539f\u6570\u7ec4\u7684\u6d45\u62f7\u8d1d\uff08\u539f\u6570\u7ec4\u4e0d\u4f1a\u88ab\u4fee\u6539\uff09\u3002\u800c splice()<\/code> \u65b9\u6cd5\u901a\u8fc7\u5220\u9664\u73b0\u6709\u5143\u7d20\u548c\/\u6216\u6dfb\u52a0\u65b0\u5143\u7d20\u6765\u6539\u53d8\u4e00\u4e2a\u6570\u7ec4\u7684\u5185\u5bb9\u3002splice()<\/code> \u65b9\u6cd5\u975e\u5e38\u7075\u6d3b\uff0c\u53ef\u4ee5\u7528\u4e8e\u6dfb\u52a0\u3001\u5220\u9664\u6216\u66ff\u6362\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u3002<\/p>\n<\/p>\n

SORT() \u548c CONCAT()<\/h4>\n<\/p>\n

sort()<\/code> \u65b9\u6cd5\u7528\u4e8e\u5bf9\u6570\u7ec4\u5143\u7d20\u8fdb\u884c\u6392\u5e8f\u3002\u5b83\u53ef\u4ee5\u63a5\u53d7\u4e00\u4e2a\u6bd4\u8f83\u51fd\u6570\u6765\u51b3\u5b9a\u6392\u5e8f\u7684\u987a\u5e8f\u3002concat()<\/code> \u65b9\u6cd5\u7528\u4e8e\u5408\u5e76\u4e24\u4e2a\u6216\u591a\u4e2a\u6570\u7ec4\uff0c\u4e0d\u6539\u53d8\u539f\u6709\u7684\u6570\u7ec4\uff0c\u800c\u662f\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\u3002<\/p>\n<\/p>\n

JOIN()<\/h4>\n<\/p>\n

join()<\/code> \u65b9\u6cd5\u5c06\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\u8fde\u63a5\u6210\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002\u53ef\u4ee5\u6307\u5b9a\u4e00\u4e2a\u5b57\u7b26\u4e32\u6765\u5206\u9694\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u3002\u5982\u679c\u6ca1\u6709\u63d0\u4f9b\u5206\u9694\u7b26\uff0c\u9ed8\u8ba4\u4f7f\u7528\u9017\u53f7\uff08,<\/code>\uff09\u3002<\/p>\n<\/p>\n

\u8fd9\u4e9b\u6570\u7ec4\u65b9\u6cd5\u662f\u5904\u7406JavaScript\u4e2d\u6570\u7ec4\u6570\u636e\u7684\u57fa\u7840\u5de5\u5177\uff0c\u80fd\u591f\u5e2e\u52a9\u6211\u4eec\u9ad8\u6548\u3001\u7b80\u6d01\u5730\u7f16\u7801\uff0c\u540c\u65f6\u4e5f\u662f\u4efb\u4f55JavaScript\u5f00\u53d1\u8005\u5fc5\u987b\u719f\u7ec3\u638c\u63e1\u7684\u6280\u80fd\u4e4b\u4e00\u3002\u901a\u8fc7\u5408\u7406\u4f7f\u7528\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u5199\u51fa\u66f4\u7b80\u6d01\u3001\u66f4\u6613\u4e8e\u7ef4\u62a4\u7684\u4ee3\u7801\u3002<\/p>\n<\/p>\n

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

Q: JavaScript\u539f\u751f\u6570\u7ec4Array\u6709\u54ea\u4e9b\u5e38\u7528\u65b9\u6cd5\uff1f<\/strong><\/p>\n

A: JavaScript\u7684\u539f\u751f\u6570\u7ec4(Array)\u6709\u5f88\u591a\u5e38\u7528\u65b9\u6cd5\uff0c\u5e38\u7528\u7684\u65b9\u6cd5\u5305\u62ec\uff1a <\/p>\n

    \n
  1. push\u548cpop\uff1a<\/strong> push\u65b9\u6cd5\u7528\u4e8e\u5411\u6570\u7ec4\u672b\u5c3e\u6dfb\u52a0\u4e00\u4e2a\u6216\u591a\u4e2a\u5143\u7d20\uff0cpop\u65b9\u6cd5\u7528\u4e8e\u5220\u9664\u6570\u7ec4\u672b\u5c3e\u7684\u5143\u7d20\u3002<\/li>\n
  2. shift\u548cunshift\uff1a<\/strong> shift\u65b9\u6cd5\u7528\u4e8e\u5220\u9664\u6570\u7ec4\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\uff0c\u5e76\u8fd4\u56de\u8be5\u5143\u7d20\uff0cunshift\u65b9\u6cd5\u7528\u4e8e\u5411\u6570\u7ec4\u7684\u5f00\u5934\u6dfb\u52a0\u4e00\u4e2a\u6216\u591a\u4e2a\u5143\u7d20\u3002<\/li>\n
  3. slice\u548csplice\uff1a<\/strong> slice\u65b9\u6cd5\u7528\u4e8e\u8fd4\u56de\u6570\u7ec4\u7684\u4e00\u90e8\u5206\uff0c\u5e76\u751f\u6210\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0csplice\u65b9\u6cd5\u7528\u4e8e\u5220\u9664\u3001\u63d2\u5165\u548c\u66ff\u6362\u6570\u7ec4\u7684\u5143\u7d20\u3002<\/li>\n
  4. concat\uff1a<\/strong> concat\u65b9\u6cd5\u7528\u4e8e\u5408\u5e76\u4e24\u4e2a\u6216\u591a\u4e2a\u6570\u7ec4\uff0c\u5e76\u751f\u6210\u4e00\u4e2a\u65b0\u6570\u7ec4\u3002<\/li>\n
  5. join\uff1a<\/strong> join\u65b9\u6cd5\u7528\u4e8e\u5c06\u6570\u7ec4\u7684\u6240\u6709\u5143\u7d20\u8fde\u63a5\u6210\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002<\/li>\n
  6. indexOf\u548clastIndexOf\uff1a<\/strong> indexOf\u65b9\u6cd5\u7528\u4e8e\u8fd4\u56de\u6570\u7ec4\u4e2d\u6307\u5b9a\u5143\u7d20\u7684\u7b2c\u4e00\u4e2a\u7d22\u5f15\uff0clastIndexOf\u65b9\u6cd5\u7528\u4e8e\u8fd4\u56de\u6570\u7ec4\u4e2d\u6307\u5b9a\u5143\u7d20\u7684\u6700\u540e\u4e00\u4e2a\u7d22\u5f15\u3002<\/li>\n
  7. sort\uff1a<\/strong> sort\u65b9\u6cd5\u7528\u4e8e\u5bf9\u6570\u7ec4\u5143\u7d20\u8fdb\u884c\u6392\u5e8f\uff0c\u9ed8\u8ba4\u6309\u7167\u5b57\u6bcd\u987a\u5e8f\u8fdb\u884c\u6392\u5e8f\u3002<\/li>\n
  8. reverse\uff1a<\/strong> reverse\u65b9\u6cd5\u7528\u4e8e\u98a0\u5012\u6570\u7ec4\u5143\u7d20\u7684\u987a\u5e8f\u3002<\/li>\n
  9. forEach\uff1a<\/strong> forEach\u65b9\u6cd5\u7528\u4e8e\u5bf9\u6570\u7ec4\u7684\u6bcf\u4e2a\u5143\u7d20\u6267\u884c\u4e00\u6b21\u56de\u8c03\u51fd\u6570\u3002<\/li>\n
  10. map\uff1a<\/strong> map\u65b9\u6cd5\u7528\u4e8e\u5bf9\u6570\u7ec4\u7684\u6bcf\u4e2a\u5143\u7d20\u6267\u884c\u4e00\u6b21\u56de\u8c03\u51fd\u6570\uff0c\u5e76\u5c06\u8fd4\u56de\u503c\u7ec4\u6210\u4e00\u4e2a\u65b0\u6570\u7ec4\u8fd4\u56de\u3002<\/li>\n<\/ol>\n

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