1,去除简单类型
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//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:
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let array = [1, 1, 1, 1, 2, 3, 4, 4, 5, 3];
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let set = new Set(array);
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console.log(set);
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// => Set {1, 2, 3, 4, 5}
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//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();
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set.add(1).add(2).add(3);
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let array = Array.from(set);
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console.log(array);
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// => [1, 2, 3]
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//于是,现在我们可以用一行代码实现数组去重了:
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let array = Array.from(new Set([1, 1, 1, 2, 3, 2, 4]));
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console.log(array);
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// => [1, 2, 3, 4]复制代码
2,去除引用类型
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var arr = [{
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"name": "ZYTX",
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"age": "Y13xG_4wQnOWK1QwJLgg11d0pS4hewePU95UHtpMl3eE81uS74NC-6zu-Rtnw4Ix",
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"gender": "AAAAAA.doc"
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}, {
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"name": "ZYTA",
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"age": "Y13xG_4wQnOWK1QwJLgg11d0pS4hewePU95UHtpMl3eE81uS74NC-6zu-Rtnw4Ix",
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"gender": "BBBBBB.doc"
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}, {
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"name": "ZDTX",
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"age": "Y13xG_4wQnOWK1QwJLgg11d0pS4hewePU95UHtpMl3eE81uS74NC-6zu-Rtnw4Ix",
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"gender": "CCCCCC.doc"
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}, {
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"name": "ZYTX",
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"age": "Y13xG_4wQnOWK1QwJLgg11d0pS4hewePU95UHtpMl3eE81uS74NC-6zu-Rtnw4Ix",
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"gender": "AAAAAA.doc"
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}];
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var hash = {};
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arr = arr.reduce(function(item, next) {
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hash[next.name] ? '' : hash[next.name] = true && item.push(next);
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return item
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}, [])
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console.log(arr);复制代码
转载于:https://juejin.im/post/5b17a2c251882513e9059231