특정한 문자를 대문자로 바꾸기

 

// javascript
const solution = (my_string, alp) => {
      return my_string.replaceAll(alp, alp.toUpperCase());
}

// typescript
const solution = (my_string:string, alp:string):string => {
      return my_string.replaceAll(alp, alp.toUpperCase());
}