filter

알고리즘 - 신규 아이디 추천 replace, slice, concat,

const yes = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p","q", "r","s","t","u","v","x","y","z","0","1","2","3","4","5","6","7","8","9","0","-","_","."]; function solution(new_id) { var answer = ''; console.log(new_id.toLowerCase()); let id = ""; new_id = new_id.toLowerCase(); for(let i = 0; i < new_id.length; ++i) { if(yes.includes(new_id[i])) { id+=new_id[i] } ..