角度:无法重新生成对象数组

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我想修改并重新生成对象数组.请检查我创建的 stackblitz

I want to modify and re-generate an array of objects. Please check my created stackblitz

请查看数据转储:

data = [ { "player settings": [ { "id": 1, "labelName": "site language", "labelValue": [ { "id": 1, "languageName": "ARABIC", "language": "لغتك", "languageCode": "AE" }, { "id": 2, "languageName": "CHINESE", "language": "你的语言", "languageCode": "ZH" }, ], "dataType": "DD", "selectedData": "2" }, { "id": 2, "labelName": "subtitle language", "labelValue": [ { "id": 1, "languageName": "ARABIC", "language": "لغتك", "languageCode": "AE" }, { "id": 2, "languageName": "CHINESE", "language": "你的语言", "languageCode": "ZH" }, ], "dataType": "DD", "selectedData": "1" }, ] }, { "channel": [ { "id": 11, "labelName": "channel label", "dataType": "TX", "selectedData": "jhfh" } ] }, { "others": [ { "id": 16, "labelName": "others label", "dataType": "TX", "selectedData": "dhgdhg" } ] } ];

如何在以下条件下修改并重新生成对象:

How can I modify and re-generate the object with the following conditions:

如果 dataType ==='DD'，则将 selectedData 转换为数字.

if dataType === 'DD' then convert selectedData into number.

我写了下面的代码，但卡在这里，但出现错误ERROR错误:this.data [key] .forEach不是函数:

I wrote the below code but stuck here and got error ERROR Error: this.data[key].forEach is not a function:

for (let key in this.data) { this.data[key].forEach(obj => { if (obj.dataType === "DD") { obj.selectedData = +(obj.selectedData || 0) } }); }

推荐答案

数组的每个元素都是一个对象.而且对象没有 forEach()方法.您可以尝试以下功能

Each element of the array is an object. And object doesn't have a forEach() method. You could try the following function

ngOnInit() { this.data.forEach(item => { for (const key in item) { // <-- `item.forEach()` won't work because it's an object item[key].forEach(subItem => { if (subItem.dataType === 'DD') { subItem.selectedData = +(subItem.selectedData || 0); } }) } }); console.log(this.data); }

我已经修改了您的 Stackblitz