JS object

sort

https://developer-talk.tistory.com/314

let pens = [
  {color: 'red',    price: 5000, brand: 'monami'},
  {color: 'blue',   price: 3000, brand: 'paker'},
  {color: 'green',  price: 4000},
  {color: 'black',  price: 1000, brand: 'abc'},
  {color: 'yellow', price: 2000},
]

// 오름차순 정렬
let pensByColors1 = pens.sort((a,b) => (a.price - b.price));
// 내림차순 정렬
let pensByColors2 = pens.sort((a,b) => (b.price - a.price));

console.log(pensByColors);

filter

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

const words = ['spray', 'limit', 'elite', 'exuberant', 'destruction', 'present'];

const result = words.filter(word => word.length > 6);

Array

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

Arr.push(data)

Object

https://developer.mozilla.org/ko/docs/Web/JavaScript/Reference/Global_Objects/Object/values

// key값 정렬
var list = {"you": 100, "me": 75, "foo": 116, "bar": 15};
keysSorted = Object.keys(list).sort(function(a,b){return list[a]-list[b]})
console.log(keysSorted);     // bar,me,you,foo

For

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for...in