//数据结构对比 增查改删
{
//map和array对比
let map =
new Map();
let array =
[];
//增
map.set('t',1
);
array.push({t:1
});
console.info('map-array',map,array)
//{"t"=>1};-[0:{t:1}]
//查
let map_exist = map.has('t'
);
let array_exist = array.find(item=>item.t);
//true
console.info('exist',map_exist,array_exist);
//{t:1}
//改
map.set('t',2
);
array.forEach(item=>item.t?2:''
);
console.info('map-array-modify',map,array);
//{"t"=>2};0:{t: 1}
//删
map.
delete('t'
);
let index = array.findIndex(item=>
item.t);
array.splice(index,1
);
console.info('map-array-empty',map,array);
//{};[]
}
{
//set和array对比
let set =
new Set();
let array =
[];
//增
set.add({'t':1
});
array.push({t:1
});
console.info('set-array',set,array);
//0:value{t:1};0:{t: 1}
//查
let set_exist = set.has({t:1
});
let array_exist = array.find(item=>
item.t);
console.info('exist',set_exist,array_exist);
//false;{t:1};
//改
set.forEach(item=>item.t?item.t=2:''
);
array.forEach(item=>item.t?item.t=2:''
);
console.info(set,array);//0:value{t:2};0:{t: 2}
//删
set.forEach(item=>item.t?set.
delete(item):''
);
let index = array.findIndex(item=>
item.t);
array.splice(index,1
);
console.info('set-array-empty',set,array);
//{};[]
}
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