今天在CSDN上問答區看到一個提問的小伙伴，是想要將一維數組轉化為三位數組的需求，正好不是很忙，樂于助人的我立馬給這位同學安排上

下面是后端同學返給我們的一維數組數據格式

	[{'品牌': 'xiaomi', '機型': '10', '配置': '512'},{'品牌': 'xiaomi', '機型': '10', '配置': '128'},{'品牌': 'xiaomi', '機型': '11', '配置': '128'},{'品牌': 'xiaomi', '機型': '11', '配置': '64'},{'品牌': 'iPhone', '機型': '10', '配置': '128'},{'品牌': 'iPhone', '機型': '11', '配置': '64'},{'品牌': 'iPhone', '機型': '12', '配置': '64'},{'品牌': 'honor', '機型': '4', '配置': '256'},{'品牌': 'honor', '機型': '5', '配置': '128'},{'品牌': 'honor', '機型': '6', '配置': '128'}];

下面是我們想要轉化的數據格式（轉化成三維數組 第一層級為品牌、第二層級為型號、第三層級為配置）

    [{"value": "xiaomi","label": "xiaomi","children": [{"value": "10","label": "10","children": [{"value": "512","label": "512"},{"value": "128","label": "128"}]},{"value": "11","label": "11","children": [{"value": "128","label": "128"},{"value": "64","label": "64"}]}]},{"value": "iPhone","label": "iPhone","children": [{"value": "10","label": "10","children": [{"value": "128","label": "128"}]},{"value": "11","label": "11","children": [{"value": "64","label": "64"}]},{"value": "12","label": "12","children": [{"value": "64","label": "64"}]}]},{"value": "honor","label": "honor","children": [{"value": "4","label": "4","children": [{"value": "256","label": "256"}]},{"value": "5","label": "5","children": [{"value": "128","label": "128"}]},{"value": "6","label": "6","children": [{"value": "128","label": "128"}]}]}]

首先我們定義一個arr變量接收我們的一維數組，然后將arr作為參數傳遞給我們轉化數組的函數，函數返回的就是我們最終的三維數組了

下面就是我們的arrConversion源碼

    arrConversion (arr) {let keys = Object.keys(arr[0])let level1 = keys[0]//獲取一級屬性名稱let level2 = keys[1]//獲取二級屬性名稱let level3 = keys[2]//獲取三級屬性名稱let list = Array.from(new Set(arr.map(item => {return item[level1]})))let subList = []list.forEach(res => {arr.forEach(ele => {if (ele[level1] === res) {let nameArr = subList.map(item => item.value)if (nameArr.indexOf(res) !== -1) {let nameArr2 = subList[nameArr.indexOf(res)].children.map(item => item.value)if (nameArr2.indexOf(ele[level2]) !== -1) {subList[nameArr.indexOf(res)].children[nameArr2.indexOf(ele[level2])].children.push({value: ele[level3],label: ele[level3],})} else {subList[nameArr.indexOf(res)].children.push({value: ele[level2],label: ele[level2],children: [{value: ele[level3],label: ele[level3],}]})}} else {subList.push({value: res,label: res,children: [{value: ele[level2],label: ele[level2],children: [{value: ele[level3],label: ele[level3],}]}]})}}})})return subList}

輸出結果正確

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