ES6数组去重的经常使用方法

数组去重的经常使用方法汇总:

方法一:

[...newSet(test)];

　　

方法二:

Array.from()

　　

const test = ['q', 'w', 'e', 'q', 'u', 'p']
Array.from(new Set(test))

　　

方法三:

function unique(arr) {
    const res = new Map();
    return arr.filter((a) => !res.has(a) && res.set(a, 1))
}

　　

方法四:

数组中对象去重;

let test = [
{
  imageId: '1',
  imageUrl: 'https://raw.githubusercontent.com/perfectSymphony/vue-admin/master/src/assets/logo.png',
},
{
  imageId: '1',
  imageUrl: 'https://raw.githubusercontent.com/perfectSymphony/vue-admin/master/src/assets/logo.png',
},
{
  imageId: '2',
  imageUrl: 'https://raw.githubusercontent.com/perfectSymphony/vue-admin/master/src/assets/logo.png',
},
{
  imageId: '3',
  imageUrl: 'https://raw.githubusercontent.com/perfectSymphony/vue-admin/master/src/assets/logo.png',
},
{
  imageId: '3',
  imageUrl: 'https://raw.githubusercontent.com/perfectSymphony/vue-admin/master/src/assets/logo.png',
},
{
  imageId: '4',
  imageUrl: 'https://raw.githubusercontent.com/perfectSymphony/vue-admin/master/src/assets/logo.png',
}
]


objTrim: function(){
	let obj = {};
	this.test= this.test.reduce((cur,next) => {
	     obj[next.imageId] ? "" : obj[next.imageId] = true && cur.push(next);
	     return cur;
    },[]);
   return this.test;
},

　　欢迎issue！！！

 

原文出处：https://www.cnblogs.com/myprogramer/p/12107575.html