CodeSignal - Arcade - Intro - JS - alphabeticShift

alphabeticShift.js

function alphabeticShift(inputString) {
    return inputString.split("").map( c => {
            if(c == 'z')
                c = 'a';
            else
                c = String.fromCharCode(c.charCodeAt(0) + 1);
            return c;
      }).join("");
}