Question

有一个数组：

var array = [{test: 1}, {test: 2}, {test: 3}]

我需要得到：

{1: 'random_value', 2: 'random_value', 3: 'random_value'}

我在做：

var values_test = _.map(array, 'test');

下一步做什么？

Answer 1

您可以使用reduce()来获得所需的结果。

＆＃13;

var array = [{test: 1}, {test: 2}, {test: 3}];

var result = array.reduce(function(r, o) {
  r[o.test] = 'random_value';
  return r;
}, {})

console.log(result)

＆＃13;

使用Lodash

＆＃13;

var array = [{test: 1}, {test: 2}, {test: 3}];

var result = _.reduce(array, function(r, o) {
  r[o.test] = 'random_value';
  return r;
}, {})

console.log(result)

＆＃13;

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

＆＃13;

Answer 2

您可以尝试这样的事情：

var array = [{
  test: 1
}, {
  test: 2
}, {
  test: 3
}]
var r = _.map(array, x => {
  let o = {}
  o[x.test] = 'random value'
  return o
});
console.log(r)

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.16.4/lodash.min.js"></script>

JS lodash [1,2] =＆gt; {1：'测试'，2：'测试'}

2 个答案: