Replace string with next character

by Uday Hiwarale

JavaScript

var str = 'aaabbbcccdddeeefffggghhhiiijjjkklllmmoopppqqqrrrssstttuuuvvwwwxxxyyyzzzz';

var newStr = str.replace(/[a-z]/gi, function(char) {
  return char === 'z' ? 'a' : String.fromCharCode(char.charCodeAt(0) + 1);
});


console.log(newStr);