fix_string_case.js

// Description:
// In this Kata, 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.
// For example:
// solve("coDe") = "code". Lowercase characters > uppercase. Change only the "D" to lowercase.
// solve("CODe") = "CODE". Uppercase characters > lowecase. Change only the "e" to uppercase.
// solve("coDE") = "code". Upper == lowercase. Change all to lowercase.

// SOLUTION:


function solve(s) {
    let countUpper = 0;
    let countLower = 0;
    for (let i = 0; i < s.length; i++) {
        if (s[i] !== s[i].toLowerCase()) {
            countUpper++;
        } else {
            countLower++;
        }
    }
    if (countUpper > countLower) {
        return s.toUpperCase();
    } else if (countUpper < countLower || countUpper === countLower) {
        return s.toLowerCase();
    }
}