{"id":774,"date":"2021-08-12T11:15:17","date_gmt":"2021-08-12T03:15:17","guid":{"rendered":"http:\/\/blog.xrhoujie.com\/?p=774"},"modified":"2021-08-11T11:17:03","modified_gmt":"2021-08-11T03:17:03","slug":"javascript-%e5%88%a0%e9%99%a4%e6%9c%89%e5%ba%8f%e6%95%b0%e7%bb%84%e4%b8%ad%e7%9a%84%e9%87%8d%e5%a4%8d%e9%a1%b9%e6%af%8f%e6%97%a5%e4%b8%80%e9%a2%98","status":"publish","type":"post","link":"http:\/\/blog.xrhoujie.com\/?p=774","title":{"rendered":"JavaScript \u5220\u9664\u6709\u5e8f\u6570\u7ec4\u4e2d\u7684\u91cd\u590d\u9879(\u6bcf\u65e5\u4e00\u9898)"},"content":{"rendered":"<p>\u7ed9\u4f60\u4e00\u4e2a\u6709\u5e8f\u6570\u7ec4 nums \uff0c\u8bf7\u4f60 \u539f\u5730 \u5220\u9664\u91cd\u590d\u51fa\u73b0\u7684\u5143\u7d20\uff0c\u4f7f\u6bcf\u4e2a\u5143\u7d20 \u53ea\u51fa\u73b0\u4e00\u6b21 \uff0c\u8fd4\u56de\u5220\u9664\u540e\u6570\u7ec4\u7684\u65b0\u957f\u5ea6\u3002<\/p>\n<p>\u4e0d\u8981\u4f7f\u7528\u989d\u5916\u7684\u6570\u7ec4\u7a7a\u95f4\uff0c\u4f60\u5fc5\u987b\u5728 \u539f\u5730 \u4fee\u6539\u8f93\u5165\u6570\u7ec4 \u5e76\u5728\u4f7f\u7528 O(1) \u989d\u5916\u7a7a\u95f4\u7684\u6761\u4ef6\u4e0b\u5b8c\u6210\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u8bf4\u660e:<\/p>\n<p>\u4e3a\u4ec0\u4e48\u8fd4\u56de\u6570\u503c\u662f\u6574\u6570\uff0c\u4f46\u8f93\u51fa\u7684\u7b54\u6848\u662f\u6570\u7ec4\u5462?<\/p>\n<p>\u8bf7\u6ce8\u610f\uff0c\u8f93\u5165\u6570\u7ec4\u662f\u4ee5\u300c\u5f15\u7528\u300d\u65b9\u5f0f\u4f20\u9012\u7684\uff0c\u8fd9\u610f\u5473\u7740\u5728\u51fd\u6570\u91cc\u4fee\u6539\u8f93\u5165\u6570\u7ec4\u5bf9\u4e8e\u8c03\u7528\u8005\u662f\u53ef\u89c1\u7684\u3002<\/p>\n<p>\u4f60\u53ef\u4ee5\u60f3\u8c61\u5185\u90e8\u64cd\u4f5c\u5982\u4e0b:<\/p>\n<p>\/\/ nums \u662f\u4ee5\u201c\u5f15\u7528\u201d\u65b9\u5f0f\u4f20\u9012\u7684\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u4e0d\u5bf9\u5b9e\u53c2\u505a\u4efb\u4f55\u62f7\u8d1d<br \/>\nint len = removeDuplicates(nums);<\/p>\n<p>\/\/ \u5728\u51fd\u6570\u91cc\u4fee\u6539\u8f93\u5165\u6570\u7ec4\u5bf9\u4e8e\u8c03\u7528\u8005\u662f\u53ef\u89c1\u7684\u3002<br \/>\n\/\/ \u6839\u636e\u4f60\u7684\u51fd\u6570\u8fd4\u56de\u7684\u957f\u5ea6, \u5b83\u4f1a\u6253\u5370\u51fa\u6570\u7ec4\u4e2d \u8be5\u957f\u5ea6\u8303\u56f4\u5185 \u7684\u6240\u6709\u5143\u7d20\u3002<br \/>\nfor (int i = 0; i &lt; len; i++) {<br \/>\nprint(nums[i]);<br \/>\n}<\/p>\n<p>\u793a\u4f8b 1\uff1a<\/p>\n<p>\u8f93\u5165\uff1anums = [1,1,2]<br \/>\n\u8f93\u51fa\uff1a2, nums = [1,2]<br \/>\n\u89e3\u91ca\uff1a\u51fd\u6570\u5e94\u8be5\u8fd4\u56de\u65b0\u7684\u957f\u5ea6 2 \uff0c\u5e76\u4e14\u539f\u6570\u7ec4 nums \u7684\u524d\u4e24\u4e2a\u5143\u7d20\u88ab\u4fee\u6539\u4e3a 1, 2 \u3002\u4e0d\u9700\u8981\u8003\u8651\u6570\u7ec4\u4e2d\u8d85\u51fa\u65b0\u957f\u5ea6\u540e\u9762\u7684\u5143\u7d20\u3002<br \/>\n\u793a\u4f8b 2\uff1a<\/p>\n<p>\u8f93\u5165\uff1anums = [0,0,1,1,1,2,2,3,3,4]<br \/>\n\u8f93\u51fa\uff1a5, nums = [0,1,2,3,4]<br \/>\n\u89e3\u91ca\uff1a\u51fd\u6570\u5e94\u8be5\u8fd4\u56de\u65b0\u7684\u957f\u5ea6 5 \uff0c \u5e76\u4e14\u539f\u6570\u7ec4 nums \u7684\u524d\u4e94\u4e2a\u5143\u7d20\u88ab\u4fee\u6539\u4e3a 0, 1, 2, 3, 4 \u3002\u4e0d\u9700\u8981\u8003\u8651\u6570\u7ec4\u4e2d\u8d85\u51fa\u65b0\u957f\u5ea6\u540e\u9762\u7684\u5143\u7d20\u3002<\/p>\n<p>\u89e3\u9898\u601d\u8def<br \/>\n1.\u5148\u5224\u65ad\u4f20\u5165\u7684\u6570\u7ec4\u5185\u5bb9\u662f\u5426\u4e3a\u7a7a\uff0c\u5982\u679c\u662f\u7a7a\u76f4\u63a5\u8fd4\u56de0\u3002<br \/>\n2.for\u904d\u5386\uff0c\u5982\u679cnums[i] \u4e0e nums[j]\u4e0d\u76f8\u540c\uff0c\u628ai++\uff0cnums[j]\u7684\u503c\u4ed8\u7ed9nums[i]\uff0c\u4e0b\u4e00\u8f6e\u65f6\u5019\u8d77\u59cbnums[i]\u5373\u662f\u5f53\u524d\u8f6enums[j]\u4f4d\u7f6e\u5185\u5bb9<br \/>\n3.\u8fd4\u56de\u5904\u7406\u540e\u7684\u5185\u5bb9<\/p>\n<p>\u4ee3\u7801<\/p>\n<p>\/**<br \/>\n* @param {number[]} nums<br \/>\n* @return {number}<br \/>\n*\/<br \/>\nvar removeDuplicates = function(nums) {<br \/>\nif(!nums.length) return 0;<br \/>\nlet i = 0;<br \/>\nfor(let j = 1; j &lt; nums.length; j++){<br \/>\nif(nums[j] !== nums[i]){<br \/>\ni++;<br \/>\nnums[i] = nums[j];<br \/>\n}<br \/>\n}<br \/>\nreturn i + 1;<br \/>\n};<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7ed9\u4f60\u4e00\u4e2a\u6709\u5e8f\u6570\u7ec4 nums \uff0c\u8bf7\u4f60 \u539f\u5730 \u5220\u9664\u91cd\u590d\u51fa\u73b0\u7684\u5143\u7d20\uff0c\u4f7f\u6bcf\u4e2a\u5143\u7d20 \u53ea\u51fa\u73b0\u4e00\u6b21 \uff0c\u8fd4\u56de\u5220\u9664\u540e\u6570\u7ec4\u7684\u65b0\u957f\u5ea6 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":180,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[10],"tags":[19],"_links":{"self":[{"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/posts\/774"}],"collection":[{"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=774"}],"version-history":[{"count":1,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/posts\/774\/revisions"}],"predecessor-version":[{"id":775,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/posts\/774\/revisions\/775"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/media\/180"}],"wp:attachment":[{"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=774"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=774"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=774"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}