function solution(answers) {
var answer = [];
const a1 = [1,2,3,4,5]; // 변해서는 안되는 값이기 때문에 const로 선언
const a2 = [2,1,2,3,2,4,2,5];
const a3 = [3,3,1,1,2,2,4,4,5,5];
let count = [0, 0, 0];
for(let i=0; i<answers.length; i++){
if(answers[i] === a1[i%a1.length]){ // answers길이가 a1 보다 길 경우에는 a1을 반복해야하기 때문에 설정.
count[0]++;
}
if(answers[i] === a2[i%a2.length]){
count[1]++;
}
if(answers[i] === a3[i%a3.length]){
count[2]++;
}
}
const max = Math.max(...count);
for(let i =0; i<3; i++){
if(count[i] === max){
answer.push(i+1)
}
}
return answer;
}
function solution(answers) {
var answer = [];
var a1 = [1,2,3,4,5];
var a2 = [2,1,2,3,2,4,2,5];
var a3 = [3,3,1,1,2,2,4,4,5,5];
var b1 = answers.filter((a,i) => a === a1[i%a1.length]).length;
var b2 = answers.filter((a,i) => a === a2[i%a2.length]).length;
var b3 = answers.filter((a,i) => a === a3[i%a3.length]).length;
var max = Math.max(b1,b2,b3);
if (b1 === max) {answer.push(1)};
if (b2 === max) {answer.push(2)};
if (b3 === max) {answer.push(3)};
return answer;
}
const words = ['spray', 'limit', 'elite', 'exuberant', 'destruction', 'present'];
const result = words.filter(word => word.length > 6);
console.log(result);
//Array ["exuberant", "destruction", "present"]
참고자료
https://developer.mozilla.org/ko/docs/Web/JavaScript/Reference/Global_Objects/Array/filter