{"id":760,"date":"2021-08-06T16:28:22","date_gmt":"2021-08-06T08:28:22","guid":{"rendered":"http:\/\/blog.xrhoujie.com\/?p=760"},"modified":"2021-08-06T10:31:50","modified_gmt":"2021-08-06T02:31:50","slug":"javascript-%e4%b8%a4%e6%95%b0%e4%b9%8b%e5%92%8c%e6%af%8f%e6%97%a5%e4%b8%80%e9%a2%98","status":"publish","type":"post","link":"http:\/\/blog.xrhoujie.com\/?p=760","title":{"rendered":"JavaScript \u4e24\u6570\u4e4b\u548c(\u6bcf\u65e5\u4e00\u9898)"},"content":{"rendered":"<div>\n<p>\u7ed9\u5b9a\u4e00\u4e2a\u6574\u6570\u6570\u7ec4 nums\u00a0\u548c\u4e00\u4e2a\u6574\u6570\u76ee\u6807\u503c target\uff0c\u8bf7\u4f60\u5728\u8be5\u6570\u7ec4\u4e2d\u627e\u51fa \u548c\u4e3a\u76ee\u6807\u503c target\u00a0 \u7684\u90a3\u00a0\u4e24\u4e2a\u00a0\u6574\u6570\uff0c\u5e76\u8fd4\u56de\u5b83\u4eec\u7684\u6570\u7ec4\u4e0b\u6807\u3002<\/p>\n<p>\u4f60\u53ef\u4ee5\u5047\u8bbe\u6bcf\u79cd\u8f93\u5165\u53ea\u4f1a\u5bf9\u5e94\u4e00\u4e2a\u7b54\u6848\u3002\u4f46\u662f\uff0c\u6570\u7ec4\u4e2d\u540c\u4e00\u4e2a\u5143\u7d20\u5728\u7b54\u6848\u91cc\u4e0d\u80fd\u91cd\u590d\u51fa\u73b0\u3002<\/p>\n<p>\u4f60\u53ef\u4ee5\u6309\u4efb\u610f\u987a\u5e8f\u8fd4\u56de\u7b54\u6848\u3002<\/p>\n<p>\u793a\u4f8b 1\uff1a<\/p>\n<p>\u8f93\u5165\uff1anums = [2,7,11,15], target = 9<br \/>\n\u8f93\u51fa\uff1a[0,1]<br \/>\n\u89e3\u91ca\uff1a\u56e0\u4e3a nums[0] + nums[1] == 9 \uff0c\u8fd4\u56de [0, 1] \u3002<br \/>\n\u793a\u4f8b 2\uff1a<\/p>\n<p>\u8f93\u5165\uff1anums = [3,2,4], target = 6<br \/>\n\u8f93\u51fa\uff1a[1,2]<br \/>\n\u793a\u4f8b 3\uff1a<\/p>\n<p>\u8f93\u5165\uff1anums = [3,3], target = 6<br \/>\n\u8f93\u51fa\uff1a[0,1]<\/p>\n<div>\/**<\/div>\n<div>* @param {number[]} nums<\/div>\n<div>* @param {number} target<\/div>\n<div>* @return {number[]}<\/div>\n<div>*\/<\/div>\n<div>var twoSum = function(nums, target) {<\/div>\n<div>let b = nums.length;<\/div>\n<div>\/\/ \u5199\u4e00\u4e2aMap\u56e0\u4e3a\u5173\u952e\u5c31\u5728\u4e8emap\u7684\u53d6\u952e\u503c\uff0c\u4f8b\u5b50\u7684\u6570\u7ec4\u5728\u53d6\u5230\u4e0b\u6807\u540e[2,7,11,15]\u76f8\u5f53\u4e8e{(1,&#8217;2&#8242;),(2,&#8217;7&#8242;),&#8230;}\u8fd9\u6837\u7684\u5f62\u5f0f<\/div>\n<div>var MAP = new Map();<\/div>\n<div>for(let i =0;i&lt;b;i++){<\/div>\n<div>\/\/ \u5faa\u73af\u627e\u5230c,c\u662ftarget\u51cf\u53bbnums\u4e0b\u6807\u4e3ai\u7684\u90a3\u4e2a\u6570\u7684\u503c<\/div>\n<div>letc = target -nums[i];<\/div>\n<div>\/\/ \u8fd9\u91ccmap\u5c31\u6d3e\u4e0a\u7528\u573a\u4e86\uff0c\u62ff\u5230c\u5224\u65ad\u8fd9\u4e2a\u6570\u5728\u6570\u7ec4\u91cc\u662f\u5426\u5b9a\u4e49\u4e86<\/div>\n<div>if(MAP.get(c) !== undefined){<\/div>\n<div>\/\/ \u8fd4\u56de\u8fd9\u4e2a\u6570\u7684\u4f4d\u7f6e\u548ci<\/div>\n<div>return [MAP.get(c),i];<\/div>\n<div>}<\/div>\n<div>\/\/ \u4f60\u4e0dset\u4e0a\u54ea\u6765\u7684\u8f93\u51fa\uff1f\uff1f\uff1f<\/div>\n<div>MAP.set(nums[i], i)<\/div>\n<div>}<\/div>\n<div>};<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u4e2a\u6574\u6570\u6570\u7ec4 nums\u00a0\u548c\u4e00\u4e2a\u6574\u6570\u76ee\u6807\u503c target\uff0c\u8bf7\u4f60\u5728\u8be5\u6570\u7ec4\u4e2d\u627e\u51fa \u548c\u4e3a\u76ee\u6807\u503c target\u00a0 \u7684 [&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\/760"}],"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=760"}],"version-history":[{"count":2,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/posts\/760\/revisions"}],"predecessor-version":[{"id":762,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/posts\/760\/revisions\/762"}],"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=760"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=760"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=760"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}