js/betterjs.js

   1 // coding: utf-8
   2 // some improvements for JavaScript
   3
   4 /**
   5   * For each object properties execute f(p, v) where p is the propertie name and v its value.
   6   * Does not traverse the protypes properties.
   7   * FIXME : Should be "Object.prototype.each = function(f)" but doen't supported by jQuery.
   8   * @o The object.
   9   * @f The function f(p, v).
  10   */
  11 //Object.prototype.each = function(f) {
  12 var objectEach = function(o, f) {
  13    for (var k in o) {
  14       if (o.hasOwnProperty(k)) {
  15          f(k, o[k]);
  16       }
  17    }
  18 };
  19
  20 /**
  21   * Return the number of properties of a given object.
  22   * Does not count the prototypes properties.
  23   * @o The object.
  24   */
  25 var objectMemberCount = function(o) {
  26    var nb = 0;
  27    for (var k in o) {
  28       if (o.hasOwnProperty(k)) {
  29          nb += 1;
  30       }
  31    }
  32    return nb;
  33 };
  34
  35 /**
  36   * Call a function to all value of the Array.
  37   * @f The function f(i, v) where i is the index and v the value.
  38   */
  39 Array.prototype.each = function(f) {
  40    for (var i = 0; i < this.length; i++) {
  41       f(i, this[i]);
  42    }
  43 };
  44
  45 /**
  46   * Map a function to all value of the Array.
  47   * @f The function f(v) -> v' where v is the old value and v' the new one.
  48   */
  49 Array.prototype.map = function(f) {
  50    for (var i = 0; i < this.length; i++) {
  51       this[i] = f(this[i]);
  52    }
  53 };
  54
  55 /**
  56   * Remove all space character (space, tab) at the begining and the end of the String.
  57   */
  58 String.prototype.trim = function() {
  59         return jQuery.trim(this); // anciennement : this.replace(/^\s+|\s+$/g, "");
  60 };
  61
  62 /**
  63   * Remove all space character (space, tab) at the begining of the String.
  64   */
  65 String.prototype.ltrim = function() {
  66         return this.replace(/^\s+/, "");
  67 };
  68
  69 /**
  70   * Remove all space character (space, tab) at the end of the String.
  71   */
  72 String.prototype.rtrim = function() {
  73         return this.replace(/\s+$/, "");
  74 };