JS合并数组对象中key相同的数据（将数组里某个属性相同的对象合并成一个数组）两种方案

将数组里某个属性相同的对象合并成一个数组

原数组如下

let resData = [ { "name": "住院医疗最高报销", "tagName": "医疗", "insuredAmount": "6000" }, { "name": "身故赔付", "tagName": "寿险", "insuredAmount": "36.00" }, { "name": "烦死了免费陈述事实", "tagName": "寿险", "insuredAmount": "8888.00" }, { "name": "你好，噜噜噜", "tagName": "寿险", "insuredAmount": "66.00" }, { "name": "120种重大疾病确诊赔付", "tagName": "重疾", "insuredAmount": "350000" } ] 

需求是，转成如下数组
也就是将具有相同“tagName”的对象合并成新数组

let Data = [ { "tagName": "医疗", dataInfo: [ { "name": "住院医疗最高报销", "tagName": "医疗", "insuredAmount": "6000" } ] }, { "tagName": "寿险", dataInfo: [ { "name": "身故赔付", "tagName": "寿险", "insuredAmount": "36.00" }, { "name": "烦死了免费陈述事实", "tagName": "寿险", "insuredAmount": "8888.00" }, { "name": "你好，噜噜噜", "tagName": "寿险", "insuredAmount": "66.00" }, ] }, { "tagName": "重疾", dataInfo: [ { "name": "120种重大疾病确诊赔付", "tagName": "重疾", "insuredAmount": "350000" } ] } ] 

以下是解决方案
方案一：

let tempArr = []; let Data = []; for (let i = 0; i < resData.length; i++) { if (tempArr.indexOf(resData[i].tagName) === -1) { Data.push({ tagName: resData[i].tagName, dataInfo: [resData[i]] }); tempArr.push(resData[i].tagName); } else { for (let j = 0; j < Data.length; j++) { if (Data[j].tagName == resData[i].tagName) { Data[j].dataInfo.push(resData[i]); break; } } } } console.log(Data); 

 方案二：

let dataInfo = {}; resData.forEach((item, index) => { let { tagName } = item; if (!dataInfo[tagName]) { dataInfo[tagName] = { tagName, child: [] } } dataInfo[tagName].child.push(item); }); let list = Object.values(dataInfo); // list 转换成功的数据 console.log(list) 

以上方法综合借鉴了其他博主的文章，总结以供大家一起学习！

 

转自于：https://blog.csdn.net/shiningyn/article/details/105409636