记录es6新增的实用数组去重的方法:

1简单类型:

//ES6中新增了Set数据结构,类似于数组,但是 它的成员都是唯一的 ,其构造函数可以接受一个数组作为参数,如:
let array = [1, 1, 1, 1, 2, 3, 4, 4, 5, 3];
let set = new Set(array);
console.log(set);
// => Set {1, 2, 3, 4, 5}

//ES6中Array新增了一个静态方法Array.from,可以把类似数组的对象转换为数组,
// 如通过querySelectAll方法得到HTML DOM Node List,以及ES6中新增的Set和Map等可遍历对象,如: let set = new Set();
 set.add(1).add(2).add(3);
 let array = Array.from(set);
 console.log(array);
 // => [1, 2, 3]

//于是,现在我们可以用一行代码实现数组去重了:
let array = Array.from(new Set([1, 1, 1, 2, 3, 2, 4]));
console.log(array);
// => [1, 2, 3, 4]

2引用类型:

// 数据
let arr = [{
  "name": "ZYTX",
  "age": "Y13xG_4wQnOWK1QwJLgg11d0pS4hewePU95UHtpMl3eE81uS74NC-6zu-Rtnw4Ix",
  "gender": "AAAAAA.doc"
}, {
  "name": "ZYTA",
  "age": "Y13xG_4wQnOWK1QwJLgg11d0pS4hewePU95UHtpMl3eE81uS74NC-6zu-Rtnw4Ix",
  "gender": "BBBBBB.doc"
}, {
  "name": "ZDTX",
  "age": "Y13xG_4wQnOWK1QwJLgg11d0pS4hewePU95UHtpMl3eE81uS74NC-6zu-Rtnw4Ix",
  "gender": "CCCCCC.doc"
}, {
  "name": "ZYTX",
  "age": "Y13xG_4wQnOWK1QwJLgg11d0pS4hewePU95UHtpMl3eE81uS74NC-6zu-Rtnw4Ix",
  "gender": "AAAAAA.doc"
}];
// 根据name值去重
const hash = {};
arr = arr.reduce((acc, curr) => {
  hash[curr.name] ? '' : hash[curr.name] = true && acc.push(curr);
  return acc;
}, []);
console.log(arr);
02-13 21:40