{"id":3209,"date":"2024-11-10T08:56:11","date_gmt":"2024-11-10T00:56:11","guid":{"rendered":"https:\/\/fwq.ai\/blog\/3209\/"},"modified":"2024-11-10T08:56:11","modified_gmt":"2024-11-10T00:56:11","slug":"js%e6%95%b0%e7%bb%84%e5%a6%82%e4%bd%95%e5%8e%bb%e9%87%8d%e5%a4%8d","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/3209\/","title":{"rendered":"js\u6570\u7ec4\u5982\u4f55\u53bb\u91cd\u590d"},"content":{"rendered":"

\n \u5982\u4f55\u79fb\u9664 javascript \u6570\u7ec4\u4e2d\u7684\u91cd\u590d\u9879\uff1a\u4f7f\u7528 set \u521b\u5efa\u4e00\u4e2a\u65b0\u7684 set \u5bf9\u8c61\uff0c\u8be5\u5bf9\u8c61\u4ec5\u5305\u542b\u552f\u4e00\u7684\u5143\u7d20\u3002\u4f7f\u7528 indexof() \u65b9\u6cd5\u904d\u5386\u6570\u7ec4\uff0c\u5e76\u4ec5\u5c06\u9996\u6b21\u9047\u5230\u7684\u5143\u7d20\u63a8\u5165\u65b0\u7684\u6570\u7ec4\u3002\u4f7f\u7528 filter() \u65b9\u6cd5\u521b\u5efa\u7b26\u5408\u6761\u4ef6\u7684\u65b0\u6570\u7ec4\uff0c\u5373\u786e\u4fdd\u5143\u7d20\u5728\u539f\u6570\u7ec4\u4e2d\u7684\u7d22\u5f15\u4e0e\u5f53\u524d\u7d22\u5f15\u76f8\u540c\u3002\u4f7f\u7528 reduce() \u65b9\u6cd5\u5c06\u6570\u7ec4\u5f52\u5e76\u4e3a\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u8be5\u65b0\u6570\u7ec4\u4ec5\u5305\u542b\u4e4b\u524d\u672a\u51fa\u73b0\u7684\u5143\u7d20\u3002\n<\/p><\/blockquote>\n

\"js\u6570\u7ec4\u5982\u4f55\u53bb\u91cd\u590d\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u79fb\u9664 JavaScript \u6570\u7ec4\u4e2d\u7684\u91cd\u590d\u9879<\/strong><\/p>\n

JavaScript \u6570\u7ec4\u662f\u4e00\u79cd\u6709\u5e8f\u7684\u53ef\u53d8\u957f\u5ea6\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u53ef\u4ee5\u5b58\u50a8\u4efb\u4f55\u7c7b\u578b\u7684\u5143\u7d20\uff0c\u5305\u62ec\u5176\u4ed6\u6570\u7ec4\u3002\u4e3a\u4e86\u4fdd\u6301\u6570\u7ec4\u7684\u552f\u4e00\u6027\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u5220\u9664\u91cd\u590d\u9879\u3002<\/p>\n

\u65b9\u6cd5 1\uff1a\u4f7f\u7528 Set<\/strong><\/p>\n

Set \u6570\u636e\u7ed3\u6784\u662f JavaScript \u4e2d\u7684\u4e00\u79cd\u5185\u7f6e\u5bf9\u8c61\uff0c\u5b83\u4ec5\u5141\u8bb8\u552f\u4e00\u7684\u5143\u7d20\u3002\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u4f7f\u7528 Set \u53bb\u9664\u91cd\u590d\u9879\uff1a<\/p>\n

const arr = [1, 2, 3, 1, 2];\nconst uniqueSet = new Set(arr);\nconst uniqueArray = [...uniqueSet];<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u65b9\u6cd5 2\uff1a\u4f7f\u7528 indexOf<\/strong><\/p>\n
indexOf() \u65b9\u6cd5\u53ef\u7528\u4e8e\u67e5\u627e\u5143\u7d20\u5728\u6570\u7ec4\u4e2d\u7684\u7b2c\u4e00\u4e2a\u51fa\u73b0\u4f4d\u7f6e\u3002\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u4f7f\u7528 indexOf() \u53bb\u9664\u91cd\u590d\u9879\uff1a<\/p>\n
const arr = [1, 2, 3, 1, 2];\nconst uniqueArray = [];\n\nfor (let i = 0; i < arr.length; i++) {\n  if (uniqueArray.indexOf(arr[i]) === -1) {\n    uniqueArray.push(arr[i]);\n  }\n}<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u65b9\u6cd5 3\uff1a\u4f7f\u7528 filter<\/strong><\/p>\n
filter() \u65b9\u6cd5\u53ef\u7528\u4e8e\u521b\u5efa\u7b26\u5408\u7279\u5b9a\u6761\u4ef6\u7684\u65b0\u6570\u7ec4\u3002\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u4f7f\u7528 filter() \u53bb\u9664\u91cd\u590d\u9879\uff1a<\/p>\n
const arr = [1, 2, 3, 1, 2];\nconst uniqueArray = arr.filter((item, index) => arr.indexOf(item) === index);<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u65b9\u6cd5 4\uff1a\u4f7f\u7528 reduce<\/strong><\/p>\n
reduce() \u65b9\u6cd5\u53ef\u7528\u4e8e\u5c06\u6570\u7ec4\u5f52\u5e76\u4e3a\u5355\u4e2a\u503c\u3002\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u4f7f\u7528 reduce() \u53bb\u9664\u91cd\u590d\u9879\uff1a<\/p>\n
const arr = [1, 2, 3, 1, 2];\nconst uniqueArray = arr.reduce((acc, cur) => (acc.includes(cur) ? acc : [...acc, cur]), []);<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u4ee5\u4e0a\u5c31\u662fjs\u6570\u7ec4\u5982\u4f55\u53bb\u91cd\u590d\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5982\u4f55\u79fb\u9664 javascript \u6570\u7ec4\u4e2d\u7684\u91cd\u590d\u9879\uff1a\u4f7f\u7528 set \u521b\u5efa\u4e00\u4e2a\u65b0\u7684 set \u5bf9\u8c61\uff0c\u8be5\u5bf9\u8c61\u4ec5\u5305\u542b\u552f\u4e00\u7684\u5143\u7d20\u3002\u4f7f\u7528 indexof() \u65b9\u6cd5\u904d\u5386\u6570\u7ec4\uff0c\u5e76\u4ec5\u5c06\u9996\u6b21\u9047\u5230\u7684\u5143\u7d20\u63a8\u5165\u65b0\u7684\u6570\u7ec4\u3002\u4f7f\u7528 filter() \u65b9\u6cd5\u521b\u5efa\u7b26\u5408\u6761\u4ef6\u7684\u65b0\u6570\u7ec4\uff0c\u5373\u786e\u4fdd\u5143\u7d20\u5728\u539f\u6570\u7ec4\u4e2d\u7684\u7d22\u5f15\u4e0e\u5f53\u524d\u7d22\u5f15\u76f8\u540c\u3002\u4f7f\u7528 reduce() \u65b9\u6cd5\u5c06\u6570\u7ec4\u5f52\u5e76\u4e3a\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u8be5\u65b0\u6570\u7ec4\u4ec5\u5305\u542b\u4e4b\u524d\u672a\u51fa\u73b0\u7684\u5143\u7d20\u3002 \u5982\u4f55\u79fb\u9664 JavaScript \u6570\u7ec4\u4e2d\u7684\u91cd\u590d\u9879 JavaScript \u6570\u7ec4\u662f\u4e00\u79cd\u6709\u5e8f\u7684\u53ef\u53d8\u957f\u5ea6\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u53ef\u4ee5\u5b58\u50a8\u4efb\u4f55\u7c7b\u578b\u7684\u5143\u7d20\uff0c\u5305\u62ec\u5176\u4ed6\u6570\u7ec4\u3002\u4e3a\u4e86\u4fdd\u6301\u6570\u7ec4\u7684\u552f\u4e00\u6027\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u5220\u9664\u91cd\u590d\u9879\u3002 \u65b9\u6cd5 1\uff1a\u4f7f\u7528 Set Set \u6570\u636e\u7ed3\u6784\u662f JavaScript \u4e2d\u7684\u4e00\u79cd\u5185\u7f6e\u5bf9\u8c61\uff0c\u5b83\u4ec5\u5141\u8bb8\u552f\u4e00\u7684\u5143\u7d20\u3002\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u4f7f\u7528 Set \u53bb\u9664\u91cd\u590d\u9879\uff1a const arr = [1, 2, 3, 1, 2]; const uniqueSet = new Set(arr); const uniqueArray = […uniqueSet]; \u767b\u5f55\u540e\u590d\u5236 \u65b9\u6cd5 2\uff1a\u4f7f\u7528 indexOf indexOf() \u65b9\u6cd5\u53ef\u7528\u4e8e\u67e5\u627e\u5143\u7d20\u5728\u6570\u7ec4\u4e2d\u7684\u7b2c\u4e00\u4e2a\u51fa\u73b0\u4f4d\u7f6e\u3002\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u4f7f\u7528 indexOf() \u53bb\u9664\u91cd\u590d\u9879\uff1a const arr = […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-3209","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/3209","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=3209"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/3209\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=3209"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=3209"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=3209"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}