Pad a string to a certain length with another string; similar to PHP's str_pad() function. - Node.js String

Node.js examples for String:Padding

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Description

Pad a string to a certain length with another string; similar to PHP's str_pad() function.

Demo Code


/* Pad a string to a certain length with another string; similar to 
PHP's str_pad() function.// w w  w .j a  va 2 s  .  co m
 * Derived from code by Carlos Reche <carlosreche at yahoo.com>.
 *    len   - Pad the string up to this length
 *   (pad)  - String used for padding (default: a single space)
 *   (type) - Type can be String.PAD_LEFT, String.PAD_RIGHT (default) or 
String.PAD_BOTH
 */
String.PAD_LEFT  = 0;
String.PAD_RIGHT = 1;
String.PAD_BOTH  = 2;

String.prototype.pad = function (len, pad, type) {
    var string = this;
    var append = new String ();

    len = isNaN (len) ? 0 : len - string.length;
      pad = typeof (pad) == 'string' ? pad : ' ';

      if (type == String.PAD_BOTH) {
        string = string.pad (Math.floor (len / 2) + string.length, pad, String.PAD_LEFT);
        return (string.pad (Math.ceil  (len / 2) + string.length, pad, String.PAD_RIGHT));
      }

      while ((len -= pad.length) > 0)
         append += pad;
      append += pad.substr (0, len + pad.length);

      return (type == String.PAD_LEFT ? append.concat (string) : string.concat (append));
}

/* Generate a uniformly distributed random integer within the range 
<min> .. <max>.
 *   (min) - Lower limit: random >= min (default: 0)
 *   (max) - Upper limit: random <= max (default: 1)
 */
Math.randomInt = function (min, max) {
    if (! isFinite (min)) min = 0;
    if (! isFinite (max)) max = 1;
    return (Math.floor ((Math.random () % 1) * (max - min + 1) + min));
}

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