基于键查询Typescript数组集合 [英] Querying Typescript array collection based on key

问题描述

我是Typescript的新手.我在typescript中有一个类型为Array的元素，基本上包含

I am new to Typescript. I have an Array of type in typescript.Basically containing the collection elements as

"ID": "669a8156-528c-43ba-8ed0-d07874534d1c",
"Name": "Temple",
"DeviceCount": "0",
"SiteCount": "0"

---

"ID": "5965ee85-2300-4c95-8743-b626f744082f",
"Name": "Building",
"DeviceCount": "2",
"SiteCount": "3"

---

.. so

---

..so on

如果我具有 ID

即类似于LINQ类型的表达式

i.e., something similar to LINQ type of expression

var result = array.Where(item => item.ID == ID);

推荐答案

您可以为此使用JavaScript Array#filter方法，该方法返回匹配数组，非常类似于LINQ代码:

You can use the JavaScript Array#filter method for this, which returns an array of matches, very similar to your LINQ code:

array.filter(item => item.ID === ID)[0].name;

您也可以使用Array#find，但是它没有很好的浏览器支持，因此您可能需要Opera和Internet Explorer的polyfill:

You could also use Array#find, but that doesn't have very good browser support, so you might need a polyfill for Opera and Internet Explorer:

array.find(item => item.ID === ID).name;

阅读有关此文档的文档: https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Array/filter

Read documentation about it: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter

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