lodash映射来自一个对象的键，并具有对象数组中的值 [英] lodash Mapping Keys from one object with values in array of objects

问题描述

我有以下对象:

var kmap={
    key1:"useless",
    key2:"useless",
    key3:"useless"
};

我需要使用此对象数组的值映射其键:

var incoming=[
    {value:"asd"},
    {value:"qwe"},
    {value:"zxc"}
];

结果:

{
    key1:"asd",
    key2:"qwe",
    key3:"zxc",
}

这是我现在的操作方式:

var result={};

var keys=Object.keys(kmap);

for(var i=0;i<incoming.length;i++)
{
    result[keys[i]]=incoming[i].value;
}

如何使用 lodash 或下划线进行操作.内置方法会更好，不想对 for 循环进行操作.

How do I do it using lodash or underscore. Built-in method would be even better, dont want to do for loop.

推荐答案

以下是使用lodash的解决方案:

Here's a solution using lodash:

var result = _.zipObject(_.keys(kmap), _.map(incoming, 'value'))

zipObject 创建一个给定键数组的对象和一组值.我们从 kmap 获取的键和值从 incoming 拔出.

zipObject creates an object given an array of keys and an array of values. The keys we get from kmap and the values are plucked from incoming.

var kmap={
    key1:"useless",
    key2:"useless",
    key3:"useless"
};

var incoming=[
    {value:"asd"},
    {value:"qwe"},
    {value:"zxc"}
];

var result = _.zipObject(_.keys(kmap), _.map(incoming, 'value'))

document.getElementById('result').textContent = JSON.stringify(result);

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.15.0/lodash.min.js"></script>

<p>
  <pre id="result"></pre>
</p>

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