Array filter

https://developer.mozilla.org/ko/docs/Web/JavaScript/Reference/Global_Objects/Array/filter

https://www.w3schools.com/jsref/jsref_filter.asp

https://msdn.microsoft.com/ko-kr/library/ff679973(v=vs.94).aspx

배열에서 필터를 통해서 원하는 값을 찾음

var users = [

{id:1,name:'a'},

{id:2,name:'b'},

{id:3,name:'c'}

]

const id = 1;

users = users.filter((user) => {

if(user.id === id){

return true;

}

});

결과값으로는 

[ { id: 1, name: 'alice' } ]

형태를 반환한다.