Fix string case

Level 7 kyu

Instruction:
you will be given a string that may have mixed uppercase and lowercase letters and your task is to convert that string to either lowercase only or uppercase only based on:

- make as few changes as possible.
- if the string contains equal number of uppercase and lowercase letters, convert the string to lowercase.


function solve(s){
  //create uppercase variable and reitarate thru the string value that doesn't have lowercase
  let upperCase = s.split('').filter(value => value !== value.toLowerCase()).length
  //create lowercase variable and reitarate thru the string value that doesn't have uppercase
  let lowerCase = s.split('').filter(value =>value !== value.toUpperCase()).length
    //if letter with lowercase is greater/equal to lowercase letter
    if(lowerCase >= upperCase){
      //return lowercase letter
      return s.toLowerCase();
      //else return uppercase letter
    } else {
      return s.toUpperCase();
    } 
  }
  

Expected output: 

console.log(solve("code"),"code");
console.log(solve("CODe"),"CODE");
console.log(solve("COde"),"code");
console.log(solve("Code"),"code");