Codility Challenge for EPAM: review

scorer.js

function solution(S) {
    let total = 0;
    
    for(var i = 0; i < S.length; i++){
         for(var c = S.length; c > i; c--){
             total += uniScore(S.slice(i, c))
         }   
    }
    return total
}

function uniScore(string){
    let score = 0;
    for(var i = 0; i < string.length; i++){
        let count = 0
        for(var c = 0; c < string.length; c++){
            if(string[i] === string[c]){
                count++
            }
        }
        if(count === 1){
            score++
        }
    }
    return score;
}

Changes:

• removed substringer function
• moved loop directly into solution function
• contains only ~60% as much code overall