Nodejs String Padding pad(width, z)

Method Source Code

String.prototype.pad = function (width, z) {
    var n = this.substr(0);
    z = z || '0';
    var newval = n.length >= width ? n : new Array(width - n.length + 1).join(z) + n;
    return newval;
};

Related

1. pad(n, char)

   String.prototype.pad = Number.prototype.pad = function(n, char)
     char = (typeof char !== 'undefined') ? char : 0;
     for ( var i=0,nstr = ''; (n-(this.toString()).length) > i; ++i)
       nstr += char;
     return nstr + this;
   };
   

2. pad(n,left, str)

   String.prototype.pad = function (n,left, str) {
     var string = String(this).substr(0,n);
     var empty = Array(n-string.length+1).join(str||' ');
     return left ? empty + this : this + empty;
   

3. pad(number, padChar)

   String.prototype.pad = function (number, padChar) {
       var toAddCount = Math.max(0, number - this.length + 1);
       padChar = padChar || '0';
       return new Array(toAddCount).join(padChar) + this;
   };
   

4. pad(side, ch, maxLength)

   String.prototype.pad = function(side, ch, maxLength) {
     var padding = "";
     for(var i = this.length; i < maxLength; i++) {
       padding += ch;
     return (side === "left") ? (padding + this) : (this + padding);
   };
   

5. pad(str, max)

   var pad = function (str, max) {
     str = str.toString();
     return str.length < max ? pad("0" + str, max) : str;
   

6. padding(val, len)

   String.prototype.padding = function (val, len) {
      var s = "";
      for (var i=0;i<len;i++)
         s+=val;
      return s;
   };