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ES6_set，map容器详解

发布时间：2019-12-01 13:02:31编辑：雪饮阅读（）

set

不重复

let set=new Set([1,2,2,3,6,6]);

         console.log(set);

add

let set=new Set([1,2,2,3,6,6]);

         set.add(7);

has

let set=new Set([1,2,2,3,6,6]);

         console.log(set.has(1));

         console.log(set.has(7));

clear

let set=new Set([1,2,2,3,6,6]);

         set.clear();

         console.log(set);

map

key不重复

let map=new Map([['key','val'],['key1','val1'],['key','val2']]);

         console.log(map);

set

         let map=new Map([['key','val'],['key1','val1'],['key','val2']]);

         map.set('key3','val3');

         console.log(map);

delete

let map=new Map([['key','val'],['key1','val1'],['key','val2']]);

         map.set('key3','val3');

         map.delete('key3');

         console.log(map);