Javascript Object, Set, Map总结

Dictionary

Use objects as associated arrays. 

定义：var object = {};

常用方法： 

check whether key is in object:

object.hashOwnProperty 

key in object

Push key value pair to object:

object.push({key:key, value:val});

object[key] = value;

Set

定义：var set = new Set();

常用方法：

set.size();

set.add(value);

set.clear();

set.delete(value);

set.has(value)

set.keys();

set.values();

Map

定义：var map = new Map();

常用方法：

map.get(key);

map.has(key);

map.set(key, value);

map.keys();

map.values();