Javascript ES6/ES5在数组中查找并更改 [英] Javascript ES6/ES5 find in array and change

问题描述

我有一个对象数组. 我想按某个字段查找，然后进行更改:

I have an array of objects. I want to find by some field, and then to change it:

var item = {...}
var items = [{id:2}, {id:2}, {id:2}];

var foundItem = items.find(x => x.id == item.id);
foundItem = item;

我希望它更改原始对象.如何? (我不在乎它是否也会在lodash中使用)

I want it to change the original object. How? (I dont care if it will be in lodash too)

推荐答案

您可以使用

You can use findIndex to find the index in the array of the object and replace it as required:

var item = {...}
var items = [{id:2}, {id:2}, {id:2}];

var foundIndex = items.findIndex(x => x.id == item.id);
items[foundIndex] = item;

这采用唯一的ID.如果您的ID重复(如您的示例所示)，则最好使用forEach:

This assumes unique IDs. If your IDs are duplicated (as in your example), it's probably better if you use forEach:

items.forEach((element, index) => {
    if(element.id === item.id) {
        items[index] = item;
    }
});

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