//数据结构对比 增查改删
{
//map、set和Object
let item = {t:1
};
let map =
new Map();
let set =
new Set();
let obj =
{};
//增
map.set('t',1
);
set.add(item);
obj['t'] = 1
;
console.info('map-set-obj',map,set,obj);
//{"t" => 1};0:value:{t: 1};{t:1};
//查
console.info({
map_exist:map.has('t'
),
set_exist:set.has(item),
obj_exist:"t"
in obj
})//true true true
//改
map.set('t',2
);
item.t = 2
;
obj['t'] = 2
;
console.info('map-set-obj-modify',obj,map,set);
//{t: 2};{"t"=>2};0:value:{t: 2}
//删
map.
delete('t'
);
set.delete(item);
delete obj['t'
];
console.info('map-set-obj-empty',obj,map,set);
//{};{};{}
}
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