function solution(numbers) {
var answer = [];
for(var i=0;i<numbers.length;i++){
answer[i]=numbers[i]*2
}
return answer;
}
unction solution(my_string) {
var answer = '';
answer=my_string.split('').reverse().join('');
return answer;
}
function solution(my_string, letter) {
var answer = '';
let letter1=new RegExp(letter,'g'); //등장하는 패턴모두를 탐색할수있도록 하는 정규식
answer=my_string.replace(letter1,'');
return answer;
}
function solution(s1, s2) {
var answer = 0;
answer=s1.filter(x=>s2.includes(x));
answer=answer.length
return answer;
}
function solution(rsp) {
var answer = '';
rsp=rsp.split('')
for(var i=0;i<rsp.length;i++){
if(rsp[i]=='2') rsp[i]='0';
else if(rsp[i]=='0') rsp[i]='5';
else if(rsp[i]=='5') rsp[i]='2';
}
answer=rsp.join('');
return answer;
}