javascript - 过滤箭头函数 (ES6)

Question

<分区>

Answer 1

您可以通过多种方式实现，例如使用 in , 使用 includes()等等。但如果我是你，我会使用 hasOwnProperty 尝试这种方式

The hasOwnProperty() method returns a boolean indicating whether the object has the specified property as its own property (as opposed to inheriting it).

var jobs = [{
    receptionist: "James"
  },
  {
    programmer: "Steve"
  },
  {
    designer: "Alicia"
  }
];

var solution = jobs.filter(obj => obj.hasOwnProperty('programmer'));
console.log(solution)

在中:

var jobs = [{receptionist: "James"}, 
            {programmer: "Steve"},
            {designer: "Alicia"}];

var solution = jobs.filter(obj => 'programmer' in obj);
console.log(solution)

包含:

var jobs = [{receptionist: "James"}, 
            {programmer: "Steve"},
            {designer: "Alicia"}];

var solution = jobs.filter(obj => Object.keys(obj).includes('programmer'));
console.log(solution)