Nodejs Utililty Methods String Repeat

String.prototype.repeat = function(num) {
    var tmpArr = [];
    for ( var i = 0; i < num; i++)
        tmpArr.push(this);
    return tmpArr.join("");

String.prototype.repeat = function (num) {
  var a = [];
  a.length = num << 0 + 1;
  return a.join(this);
};

String.prototype.repeat = function (num) {
    return new Array(num + 1).join(this);
};

String.prototype.repeat = function(num){
    return new Array( num + 1 ).join( this );
Array.prototype.indexOfgenericId = function(id, pos) {
    for (var i = 0; i < this.length; i++)
        if (this[i].genericId === id){
            return this[i]._id; i=0; break;}
    return (this[pos] || '' && pos == -1)? this[pos]._id : null;      

String.prototype.repeat = function(num) {
  return new Array(num+1).join(this);
};

String.prototype.repeat=function(num){
    return new Array(num+1).join(this)
String.prototype.ucfirst=function(){
    return this.charAt(0).toUpperCase()+this.slice(1)

String.prototype.repeat = function(num){
    if(typeof(num)!='number' || num < 0) return this;
    result = '';
    for(var i = 0; i < num; i++){
  result += this;
    return result;
};

String.prototype.repeat = function(repeat){
  var endString = '';
  for(var i = 0; i<repeat; i+=1){
    endString += this;
  return endString;

String.prototype.repeat = function(times) {
   return (new Array(times + 1)).join(this);
};

String.prototype.repeat = function(times) {
  return new Array(times+1).join(this);
};
console.log( "yes".repeat(3) );