JavaScript过滤对象数组 - Javascript

在JavaScript中，我们经常需要对一个对象数组进行过滤，以便从中找到我们需要的项。这种过滤操作可以用数组的filter()方法来实现，但是如果我们想根据对象的某些属性来进行过滤，就需要写一些额外的代码来处理。

下面是一个示例对象数组：

let myArray = [
  { name: "Alice", age: 25, occupation: "Software Engineer" },
  { name: "Bob", age: 30, occupation: "Product Manager" },
  { name: "Charlie", age: 35, occupation: "Software Engineer" }
];

如果我们想只获取occupation属性为"Software Engineer"的对象，可以使用filter()方法结合箭头函数来实现：

let softwareEngineers = myArray.filter(obj => obj.occupation === "Software Engineer");

console.log(softwareEngineers);    // [{ name: "Alice", age: 25, occupation: "Software Engineer" }, { name: "Charlie", age: 35, occupation: "Software Engineer" }]

如果我们想同时过滤occupation属性为"Software Engineer"和age属性大于或等于30的对象，可以在箭头函数内添加逻辑运算符：

let filteredArray = myArray.filter(obj => obj.occupation === "Software Engineer" && obj.age >= 30);

console.log(filteredArray);    // [{ name: "Charlie", age: 35, occupation: "Software Engineer" }]

简单来说，我们可以通过使用filter()方法，结合箭头函数和逻辑运算符，来轻松地过滤出需要的对象。