javascript - 如何在n个对象数组中进行交集？

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假设我们有一个对象数组

var users = [[
  { user: 'barney', age: 36, active: true },
  { user: 'fred',  age: 41, active: true },
  { user: 'travis', age: 37, active: true }
], [
  { user: 'barney1', age: 36, active: true },
  { user: 'fred',  age: 40, active: false },
  { user: 'travis', age: 37, active: true}
], [   
  { user: 'barney1', age: 36, active: true },
  { user: 'fred',  age: 40, active: false },
  { user: 'travis', age: 37, active: true} 
]];

我想对上述对象应用交集。我努力了 与 lodash 方法交集，如

_.intersection(...users)

但它给出了一个空数组。

Answer 1

如果您想根据所有属性是否相同来将它们相交，请使用 intersectionWith和 isEqual

const users = [[{user:'barney',age:36,active:true},{user:'fred',age:41,active:true},{user:'travis',age:37,active:true}],[{user:'barney1',age:36,active:true},{user:'fred',age:40,active:false},{user:'travis',age:37,active:true}],[{user:'barney1',age:36,active:true},{user:'fred',age:40,active:false},{user:'travis',age:37,active:true}]]

const intersected = _.intersectionWith(...users, _.isEqual);

console.log(intersected)

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.10/lodash.min.js"></script>