{"id":1774,"date":"2024-11-10T11:30:29","date_gmt":"2024-11-10T03:30:29","guid":{"rendered":"https:\/\/fwq.ai\/blog\/1774\/"},"modified":"2024-11-10T11:30:29","modified_gmt":"2024-11-10T03:30:29","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8-javascript-%e7%bb%9f%e8%ae%a1%e6%95%b0%e7%bb%84%e4%b8%ad%e6%95%b0%e6%8d%ae%e9%87%8d%e5%a4%8d%e6%ac%a1%e6%95%b0%e5%b9%b6%e6%b8%b2%e6%9f%93%e5%88%b0%e9%a1%b5","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/1774\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528 JavaScript \u7edf\u8ba1\u6570\u7ec4\u4e2d\u6570\u636e\u91cd\u590d\u6b21\u6570\u5e76\u6e32\u67d3\u5230\u9875\u9762\uff1f"},"content":{"rendered":"

\"\u5982\u4f55\u4f7f\u7528<\/p>\n

\u5224\u65ad\u6570\u7ec4\u4e2d\u6570\u636e\u7684\u91cd\u590d\u6b21\u6570\u5e76\u6e32\u67d3\u81f3\u9875\u9762<\/strong><\/p>\n

\u5728\u524d\u7aef\uff0c\u6839\u636e\u6570\u7ec4\u5bf9\u8c61\u4e2d\u67d0\u4e2a\u5b57\u6bb5\u4f5c\u4e3a\u5224\u65ad\u6761\u4ef6\uff0c\u5224\u65ad\u91cd\u590d\u6570\u636e\u9879\u5e76\u7edf\u8ba1\u91cd\u590d\u6b21\u6570\uff0c\u662f\u5e38\u89c1\u7684\u4e1a\u52a1\u9700\u6c42\u4e4b\u4e00\u3002\u672c\u6587\u5c06\u4ee5\u201cNO\u201d\u5b57\u6bb5\u4e3a\u4f8b\uff0c\u5bf9\u8fd9\u4e2a\u95ee\u9898\u8fdb\u884c\u8be6\u7ec6\u89e3\u7b54\u3002<\/p>\n

\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u901a\u8fc7 reduce \u65b9\u6cd5\u5bf9\u6570\u7ec4\u4e2d\u7684\u5bf9\u8c61\u8fdb\u884c\u5206\u7ec4\uff0c\u5c06\u76f8\u540c\u201cNO\u201d\u5b57\u6bb5\u7684\u503c\u5f52\u4e3a\u4e00\u7ec4\uff0c\u5e76\u7edf\u8ba1\u6bcf\u7ec4\u5bf9\u8c61\u7684\u4e2a\u6570\u3002\u5728\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\uff0c\u9700\u8981\u5bf9\u5df2\u5b58\u5728\u7684\u6570\u636e\u8fdb\u884c\u5224\u65ad\u548c\u66f4\u65b0\uff0c\u5177\u4f53\u64cd\u4f5c\u5982\u4e0b\uff1a<\/p>\n

let newArr = arr.reduce((s, v) => {\n    let index = s.findIndex(it => it.NO === v.NO)\n    index !== -1 ? s[index] = {...v, count: ++s[index].count} : s.push({...v, count: 1})\n    return s\n}, newArr)<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5b8c\u6210\u5206\u7ec4\u540e\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u5c06\u7edf\u8ba1\u597d\u7684\u6570\u636e\u6e32\u67d3\u5230\u9875\u9762\u4e0a\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
const table = document.getElementById('table')\ntable.innerHTML = `\n    <thead>\n        <tr>\n            <th>Data.NO<\/th>\n            <th>\u63a2\u6d4b\u6b21\u6570<\/th>\n            <th>\u91cd\u590d\u6b21\u6570<\/th>\n        <\/tr>\n    <\/thead>\n    <tbody>\n        ${newArr.map(({NO, count}) => `\n            <tr>\n                <td>${NO}<\/td>\n                <td>${count}<\/td>\n            <\/tr>\n        `).join('')}\n    <\/tbody>\n`<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8fd9\u6837\uff0c\u5c31\u53ef\u4ee5\u6839\u636e\u201cNO\u201d\u5b57\u6bb5\u5224\u65ad\u6570\u7ec4\u4e2d\u6570\u636e\u7684\u91cd\u590d\u6b21\u6570\uff0c\u5e76\u5c06\u7edf\u8ba1\u7ed3\u679c\u6e32\u67d3\u5230\u9875\u9762\u4e0a\u3002<\/p>\n
\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u5982\u4f55\u4f7f\u7528 JavaScript \u7edf\u8ba1\u6570\u7ec4\u4e2d\u6570\u636e\u91cd\u590d\u6b21\u6570\u5e76\u6e32\u67d3\u5230\u9875\u9762\uff1f\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":"
\u5224\u65ad\u6570\u7ec4\u4e2d\u6570\u636e\u7684\u91cd\u590d\u6b21\u6570\u5e76\u6e32\u67d3\u81f3\u9875\u9762 \u5728\u524d\u7aef\uff0c\u6839\u636e\u6570\u7ec4\u5bf9\u8c61\u4e2d\u67d0\u4e2a\u5b57\u6bb5\u4f5c\u4e3a\u5224\u65ad\u6761\u4ef6\uff0c\u5224\u65ad\u91cd\u590d\u6570\u636e\u9879\u5e76\u7edf\u8ba1\u91cd\u590d\u6b21\u6570\uff0c\u662f\u5e38\u89c1\u7684\u4e1a\u52a1\u9700\u6c42\u4e4b\u4e00\u3002\u672c\u6587\u5c06\u4ee5\u201cNO\u201d\u5b57\u6bb5\u4e3a\u4f8b\uff0c\u5bf9\u8fd9\u4e2a\u95ee\u9898\u8fdb\u884c\u8be6\u7ec6\u89e3\u7b54\u3002 \u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u901a\u8fc7 reduce \u65b9\u6cd5\u5bf9\u6570\u7ec4\u4e2d\u7684\u5bf9\u8c61\u8fdb\u884c\u5206\u7ec4\uff0c\u5c06\u76f8\u540c\u201cNO\u201d\u5b57\u6bb5\u7684\u503c\u5f52\u4e3a\u4e00\u7ec4\uff0c\u5e76\u7edf\u8ba1\u6bcf\u7ec4\u5bf9\u8c61\u7684\u4e2a\u6570\u3002\u5728\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\uff0c\u9700\u8981\u5bf9\u5df2\u5b58\u5728\u7684\u6570\u636e\u8fdb\u884c\u5224\u65ad\u548c\u66f4\u65b0\uff0c\u5177\u4f53\u64cd\u4f5c\u5982\u4e0b\uff1a let newArr = arr.reduce((s, v) => { let index = s.findIndex(it => it.NO === v.NO) index !== -1 ? s[index] = {…v, count: ++s[index].count} : s.push({…v, count: 1}) return s }, newArr) \u767b\u5f55\u540e\u590d\u5236 \u5b8c\u6210\u5206\u7ec4\u540e\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u5c06\u7edf\u8ba1\u597d\u7684\u6570\u636e\u6e32\u67d3\u5230\u9875\u9762\u4e0a\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a const table = document.getElementById(‘table’) table.innerHTML = ` <thead> <tr> <th>Data.NO<\/th> <th>\u63a2\u6d4b\u6b21\u6570<\/th> <th>\u91cd\u590d\u6b21\u6570<\/th> <\/tr> <\/thead> <tbody> ${newArr.map(({NO, […]<\/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-1774","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/1774","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=1774"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/1774\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=1774"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=1774"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=1774"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}