如何用lodash过滤对象的键？

问题描述

我有一个键的对象，我只想保留一些键的值？

我试着用过滤器：

  var data = {
aaa：111，
 abb：222，
bbb：333 
}; 
 
 var result = _.filter（data，function（value，key）{
 return key.startsWith（a）; 
}）
 
 console.log（result）; 
  

但它打印一个数组：

这不是我想要的。

如何用lodash做到这一点？或者别的东西，如果lodash不工作？

现场演示：

解决方案

Lodash有功能

$ b

var thing = { a：123，b：456，abc：6789}; var result = _.pickBy（thing，function（value，key）{return _.startsWith（key，a）;}）; console.log（result.abc）// 6789console.log（result.b）// undefined

 < script src =https://cdn.jsdelivr.net/lodash/4.16.4/lodash.min.js>< / script>  

I have an object with some keys, and I want to only keep some of the keys with their value?

I tried with filter:

var data = {
  "aaa":111,
  "abb":222,
  "bbb":333
};

var result = _.filter(data, function(value, key) {
  return key.startsWith("a");
})

console.log(result);

But it prints an array:

[111, 222]

Which is not what I want.

How to do it with lodash? Or something else if lodash is not working?

Live demo: http://jsbin.com/moqufevigo/1/edit?js,output

解决方案

Lodash has a _.pickBy function which does exactly what you're looking for.

var thing = {
  "a": 123,
  "b": 456,
  "abc": 6789
};

var result = _.pickBy(thing, function(value, key) {
  return _.startsWith(key, "a");
});

console.log(result.abc) // 6789
console.log(result.b)   // undefined

<script src="https://cdn.jsdelivr.net/lodash/4.16.4/lodash.min.js"></script>

这篇关于如何用lodash过滤对象的键？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！