Nodejs String Repeat repeat(count)

Method Source Code

var range = function(k) {
    return Array.apply(null, Array(k)).map(function(_, i) {
        return i;
    });/* w w w .j  av  a 2  s .com*/
};


String.prototype.repeat = function(count) {
    if (count < 1) return '';
    var result = '', pattern = this.valueOf();
    while (count > 1) {
        if (count & 1) result += pattern;
        count >>= 1, pattern += pattern;
    }
    return result + pattern;
};


Array.prototype.count = function(element) {
    return this.filter(function(x){return x == element}).length
};

Related

1. repeat(count)

   String.prototype.repeat = function(count) {
       if (count < 1) return '';
       var result = '', pattern = this.valueOf();
       while (count > 1) {
           if (count & 1) result += pattern;
           count >>>= 1, pattern += pattern;
       return result + pattern;
   };
   ...
   

2. repeat(count)

   String.prototype.repeat = function (count) {
     var str,
       pattern,
       i;
     pattern = String(this);
     if (!count) {
       return pattern;
     str = '';
   ...
   

3. repeat(count)

   String.prototype.repeat = function (count) {
     if (count < 1) return '';
     var str = '';
     while (count > 0) {
       str += this;
       count--;
     return str;
   

4. repeat(count)

   String.prototype.repeat = function(count) {
       var result = "";
       var i;
       for (i = 0; i < count; i += 1) {
           result += this;
       return result;
   };
   

5. repeat(count)

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

6. repeat(count)

   String.prototype.repeat = function(count) {
     if (count < 1) return '';
     var result = '', pattern = this.valueOf();
     while (count > 0) {
       if (count & 1) result += pattern;
       count >>= 1, pattern += pattern;
     return result;
   };
   ...
   

7. repeat(count)

   String.prototype.repeat = function(count) {
     if (count < 1) return '';
     var result = '', pattern = this.valueOf();
     while (count > 0) {
       if (count & 1) result += pattern;
       count >>= 1, pattern += pattern;
     return result;
   };
   ...
   

8. repeat(count)

   String.prototype.repeat = function(count) {
       if (count < 1) return '';
       var result = '', pattern = this.valueOf();
       while (count > 0) {
           if (count & 1) result += pattern;
           count >>= 1, pattern += pattern;
       return result;
   };
   ...
   

9. repeat(count)

   String.prototype.repeat = function(count) {
     if (count === 1) return this;
     return this + this.repeat(count - 1);
   };