想统计出数组里相同名称的数量之和

Question

这组数据中 怎么把name的值相同的number相加？
原数据

希望统计的结果

var res = [{

    "name": "apple",

    "number": "19",

}, {

    "name": "orange",

    "number": "25",

}, {

    "name": "banana",

    "number": "1",

}];

Answer 1

注意number 是个字符串let tmp = {}res.forEach(v => tmp[v.name] = (tmp[v.name] || 0) + Number(v.number))res = Object.keys(tmp).map(name => ({ name, number: tmp[name]}))console.log(res)