Lodash 功能无法正常使用

Question

我有对象数组：

var arr = [{id:1, name:Michael},
    {Id:2, name:"Mix"},
    {Id:3, name:"Mark"},
    {Id:4, name:"Marta"},
    {Id:5, name:"Anna"}];

var desiredId = 3;

我尝试在 lodash 库的帮助下从对象数组中获取对象：

var result = _.find(arr, 'Id', desiredId);

但我总是反对id = 1（即{id:1, name:Michael}）。

知道为什么我没有得到预期的对象（其中 Id = 3）。

Answer 1

如果勾选find() lodash documentation, there should be an example where you can use a matches()shorthand。您会注意到这种 shorthand 在从集合中查询时很常见。

示例：

var arr = [
    {Id:1, name:"Michael"},
    {Id:2, name:"Mix"},
    {Id:3, name:"Mark"},
    {Id:4, name:"Marta"},
    {Id:5, name:"Anna"}
];

var desiredId = 3;
var result = _.find(arr, { Id: desiredId });

document.write('<pre>' + JSON.stringify(result, 0, 4) + '</pre>');

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.12.0/lodash.js"></script>

Lodash 功能无法正常使用

Lodash function does not work properly

javascript

underscore.js

lodash