Javascript：过滤掉对象数组并根据键而不是值进行选择

Question

我正在尝试循环遍历具有不同键的对象数组。有没有一种方法可以让我根据它们的键选择一个对象？

var array = [
  {
    "1400": "Accident and Health"
  },
  {
    "100": "Life"
  },
  {
    "1300": "Pension"
  }
]
var a = "100";
var pop = _.pick(array,a);
console.log(pop);

期望的输出：

生活

谢谢！

Answer 1

您可以使用 in 运算符。

var array = [{ 1400: "Accident and Health" }, { 100: "Life" }, { 1300: "Pension" }];

var result = (key => array.find(item => key in item)[key])(100);

console.log(result);

Answer 2

var array = [
  {
    "1400": "Accident and Health"
  },
  {
    "100": "Life"
  },
  {
    "1300": "Pension"
  }
]
var a = "100";


var pop = _.map(array, function(currentObject) {
  var b= _.pick(currentObject, a);
  if(!_.isEmpty(b))
    console.log(b);
});

<script src="http://underscorejs.org/underscore-min.js"></script>

Answer 3

lodash 4.17.2

_.chain(array).map('100').compact().head().value();

Javascript：过滤掉对象数组并根据键而不是值进行选择

Javascript: Filter out on an array of objects and pick based on key, not value

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underscore.js

lodash