Nodejs Utililty Methods String Replace

String.prototype.replaceAt=function(index, character) {
    return this.substr(0, index) + character + this.substr(index+character.length);
function solve(input) {
  var pass = "        ";
  var iterator = 0;
  while (pass.includes(" ")) {
    var hash = md5(input + iterator);
    if (hash.startsWith("00000")) {
...

var testWhite = function(x) {
    var white = new RegExp(/^\s$/);
    return white.test(x.charAt(0));
};
String.prototype.replaceAt=function(index, character) {
    return this.substr(0, index) + character + this.substr(index+character.length);
};
function titleCase(str) {
str=str.toLowerCase();
...

String.prototype.replaceAt = function(index, character) {
    return this.substr(0, index) + character + this.substr(index + character.length);
};
function titleCase(str) {
    var palavras = str.split(' ');
    var newStr = [];
    for (i = 0; i < palavras.length; i++) {
      newStr[i] = palavras[i].toLowerCase().replaceAt(0, palavras[i].charAt(0).toUpperCase());
    return newStr.join(' ');
titleCase("I'm a little tea pot");

String.prototype.replaceAt=function(index, character) {
    return this.substr(0, index) + character + this.substr(index+character.length);
function eso(n) {
        var w = n[0].split(" ");
        var c = n[1].split(", ");
        c.forEach(function(x) {
            var s = x.split("-");
            var tmp = w[s[0]];
...

String.prototype.replaceAt = function(index, character) { 
    return this.substr(0, index) + character + this.substr(index + character.length);
function commafy(inVal) { 
  var arrWhole = (inVal + "").split(".");
  var arrTheNumber = arrWhole[0].split("").reverse();
  var newNum = Array();
  for (var i = 0; i < arrTheNumber.length; i++ ) { 
    newNum[newNum.length] = ((i%3===2) && ( i < arrTheNumber.length-1) ) ? " " + arrTheNumber[i]: arrTheNumber[i];
...

String.prototype.replaceAt = function(index, character) {
  return this.substr(0, index) + character + this.substr(index + character.length);
};

String.prototype.replaceAt=function(index, character) 
    return this.substr(0, index) + character + this.substr(index+character.length);

String.prototype.replaceAt=function(index, character) {
    return this.substr(0, index) + character + this.substr(index+character.length);
var off = "O";
var calculateRow = function(totalLights, lightsTurnedOn, lightColor){
  return Array(lightsTurnedOn + 1).join(lightColor) + Array(totalLights - lightsTurnedOn + 1).join(off);
var berlinClock = function(number){
  var split = number.split(":");
...

String.prototype.replaceAt = function(index, character) {
  character = character.toString();
  return this.substr(0, index) + character + this.substr(index+character.length);

String.prototype.replaceAt=function(index, replacement) {
    return this.substr(0, index) + replacement+ this.substr(index + replacement.length);