javascript - 基于另一个数组从对象数组中过滤数组属性

Question

这个问题已经有答案了:

JavaScript filter array by data from another (7 个回答)

Filter out an array from another array [duplicate] (3 个回答)

已关闭 3 年前。

我想根据另一个数组过滤具有数组属性的对象数组:

[
  {
   id: 50,
   name: 'test1',
   countries: ['RO','GB'],
  }, {
    id: 51,
    name: 'test2',
    countries: ['DE', 'RO'],
  }, {
    id: 52,
    name: 'test3',
    countries: ['DE'],
  }
]

我想返回一个对象数组，可以通过一组国家/地区进行过滤，这意味着如果我想按 1、2 个国家/地区进行过滤。

1. countries: ['RO']

或

2. countries: ['RO', 'DE'],

预期输出为:

1.

[
  {
   id: 50,
   name: 'test1',
   countries: ['RO', 'DE' ,'GB'],
  }, {
    id: 51,
    name: 'test2',
    countries: ['DE', 'RO'],
  }
]

2.

[
  {
   id: 50,
   name: 'test1',
   countries: ['RO', 'DE' ,'GB'],
  }, {
    id: 51,
    name: 'test2',
    countries: ['DE', 'RO'],
  }, {
    id: 52,
    name: 'test3',
    countries: ['DE'],
  }
]

Answer 1

您可以使用filter()和includes()方法；

var import1 = [
  {
   id: 50,
   name: 'test1',
   countries: ['RO','GB'],
  }, {
    id: 51,
    name: 'test2',
    countries: ['DE', 'RO'],
  }, {
    id: 52,
    name: 'test3',
    countries: ['DE'],
  }
];

var export1 =  import1.filter(function(importz){
	
return importz.countries.includes("DE");
});

console.log(export1);