Nodejs String Repeat repeat(n)

Method Source Code

String.prototype.repeat = function(n)
{
    return new Array(n+1).join(this);
}
function christmasTree(height) {
  var tree = [];// w  w  w  .  j  av a 2  s .  c  o m
  for(var i = 1; i <= height; i++) {
    tree.push(" ".repeat(height - i) + "*".repeat((i - 1) * 2 + 1) + " ".repeat(height - i));
  }
  return tree.join("\n");
}

Related

1. repeat(length)

   String.prototype.repeat = function(length) {
       var that = this;
       for (var i = 0; i < length-1; i++) {
           that += this;
       return that;
   

2. repeat(n)

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

3. repeat(n)

   String.prototype.repeat = function(n) {
       return new Array(1 + n).join(this);
   console.log("ha".repeat(5));  
   

4. repeat(n)

   String.prototype.repeat = function(n) {
       return new Array(1 + (n || 0)).join(this);
   console.log("ha".repeat(5));  
   

5. repeat(n)

   String.prototype.repeat = function(n) {
       return new Array(isNaN(n) ? 1 : ++n).join(this);
   

6. repeat(n)

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

7. repeat(n)

   String.prototype.repeat= function(n){
       n= n || 1;
       return Array(n+1).join(this);
   

8. repeat(n)

   String.prototype.repeat = function(n) {
     var s = "", t = this.toString();
     while (--n >= 0) {
       s += t
     return s;
   

9. repeat(n)

   String.prototype.repeat = function(n){
     var str = "";
     while(n > 0){
       str += this;
       --n;
     return str;