{"id":111482,"date":"2020-05-21T13:00:19","date_gmt":"2020-05-21T05:00:19","guid":{"rendered":"http:\/\/4563.org\/?p=111482"},"modified":"2020-05-21T13:00:19","modified_gmt":"2020-05-21T05:00:19","slug":"js-%e6%80%8e%e4%b9%88%e5%b0%86-1-%e7%a7%8d%e6%95%b0%e7%bb%84%e8%bd%ac%e6%8d%a2%e4%b8%ba%e5%8f%a6%e4%b8%80%e7%a7%8d%e6%95%b0%e7%bb%84%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=111482","title":{"rendered":"Js \u600e\u4e48\u5c06 1 \u79cd\u6570\u7ec4\u8f6c\u6362\u4e3a\u53e6\u4e00\u79cd\u6570\u7ec4\uff1f"},"content":{"rendered":"
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Js \u600e\u4e48\u5c06 1 \u79cd\u6570\u7ec4\u8f6c\u6362\u4e3a\u53e6\u4e00\u79cd\u6570\u7ec4\uff1f <\/h1>\n

<\/p>\n

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\u8cc7\u6df1\u5927\u4f6c : LionXen <\/span> <\/i> 52<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
\u8bf7\u6559\u5927\u4f6c\u3002<\/p>\n

array[0][name]:apple
array[0][price]:55.00
array[0][tips]:red apple
array[1][name]:orange
array[1][price]:41.13
array[1][tips]:4orange<\/p>\n

\u5982\u4f55\u8f6c\u6362\u4e3a:<\/p>\n

array[name][0]:apple
array[name][1]:orange
array[price][0]:55.00
array[price][1]:41.13
array[tips][0]:red apple
array[tips][1]:4orange <\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (9<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Pastsong <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd9\u3002\u3002for-loop \u4e0d\u5c31\u597d\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : l1nyanm1ng <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    “`js
    const array = [
    {
    name: ‘apple’,
    price: 55.0,
    tips: ‘red apple’,
    },
    {
    name: ‘orange’,
    price: 41.13,
    tips: ‘4 orange’,
    }
    ];<\/p>\n

    const ret = array.reduce((accmulator, current) => {
    Object.entries(current).forEach(([prop, value]) => {
    if (!Reflect.has(accmulator, prop)) {
    accmulator[prop] = [];
    }
    accmulator[prop].push(value);
    });
    return accmulator;
    }, {});<\/p>\n

    console.log(ret);
    “` <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : xiaoming1992 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8ddf#2 \u5dee\u4e0d\u591a
    “` javascript
    const arr = [
    {
    name: “name1”,
    price: “price1”,
    tips: “tips1”,
    },
    {
    name: “name2”,
    price: “price2”,
    tips: “tips2”,
    },
    ]<\/p>\n

    const result = arr.reduce((prev, cur, i) => {
    Object.entries(cur).forEach(([key, val]) => {
    if (!prev[key]) { prev[key] = […new Array(arr.length)] }
    prev[key][i] = val
    })
    return prev
    }, {})<\/p>\n

    console.log(result)
    “` <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : palmers <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    “`js
    const arr = [{name: ‘apple’, price: 55.00, tips: ‘red apple’}, {name: ‘org’, price: 52.00, tips: ‘red apple’}];
    const vx = arr.reduce((ac, item) => {
    const keys = Object.keys(item);
    keys.map(key => {
    const has = ac.hasOwnProperty(key);
    if(has) {\/\/{name: ‘apple’, price: 55.00, tips: ‘red apple’}
    const maybeArr = ac[key];
    const isArr = Array.isArray(maybeArr);
    if(isArr) { ac[key].push(item[key])}else {ac[key] = [ac[key], item[key]];}
    }else {
    ac[key] = [ac[key]];
    }
    });
    return ac;
    });
    console.log(vx);
    “`
    \u6211\u8fd9\u662f\u6bd4\u8f83\u7b28\u62d9\u7684\u5199\u6cd5 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : jianguiqubaa <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    arr.reduce((acc, item) => Object.entries(item).reduce((pre, [key, value]) => ({…pre, [key]: […(pre[key] || []), value]}), acc), {}) <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : palmers <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @jianguiqubaa \u5b8c\u7f8e \uff0c \u4ee3\u7801\u592a\u5e05\u4e86!! <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : kyuuseiryuu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    const arr = [
    ….{
    ……..name: “name1”,
    ……..price: “price1”,
    ……..tips: “tips1”,
    ….},
    ….{
    ……..name: “name2”,
    ……..price: “price2”,
    ……..tips: “tips2”,
    ….},
    ]
    console.log(arr);
    const result = {};
    arr.forEach(element => {
    ….Object.keys(element).forEach(key => {
    ……..if (!result[key]) {
    …………result[key] = [];
    ……..}
    ……..result[key].push(element[key]);
    ….})
    });<\/p>\n

    console.log(result);<\/p>\n

    \u4e3a\u4ec0\u4e48\u8981\u7528 reduce\uff0cforeach \u4e0d\u9999\u5417\uff1f <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : onfuns <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    for \u5faa\u73af\u554a\uff0c\u975e\u5f00\u6e90\u9879\u76ee\u4e0d\u8981\u5199\u7684\u592a\u7cbe\u7b80\uff0c\u4e0d\u7136\u540e\u671f\u6709\u7ef4\u62a4\u7684\u53ef\u80fd\u6027\uff0c\u5230\u65f6\u5c31\u86cb\u75bc\u4e86\u3002\u4e1a\u52a1\u4ee3\u7801\u5c31\u8981\u4e00\u76ee\u4e86\u7136\uff01 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : clare233 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    7 \u7684\u4f18\u96c5\uff0c\u4e1a\u52a1\u4ee3\u7801\u786e\u5b9e\u4e0d\u662f\u5199\u7684\u8d8a\u77ed\u7ea6\u597d\uff0c7 \u8fd9\u4e2a\u5f88\u4e00\u76ee\u4e86\u7136 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    Js \u600e\u4e48\u5c06 1 \u79cd\u6570\u7ec4\u8f6c\u6362\u4e3a\u53e6\u4e00…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/111482"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=111482"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/111482\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=111482"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=111482"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=111482"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}