extend, toggleClass, and equals methods

objProtaddl.js

// functional additions to the Object prototype

Object.prototype.extend = function() {
  if (arguments.length === 0)
    return this;
 
  for (var i = 0; i < arguments.length; i++) {
    for (var property in arguments[i]) {
      if (arguments[i].hasOwnProperty(property))
        this[property] = arguments[i][property];
    }
  }
  return this;
};


Object.prototype.equals = function(x) {
  var p;
  for(p in this) {
    if (typeof(x[p]) == "undefined")
      return false;
  }
  
  for(p in this) {
    if (this[p]) {
      switch(typeof(this[p])) {
        case "object":
          if (!this[p].equals(x[p])) {
            return false;
          }
          break;
        case "function":
          if (typeof(x[p]) == "undefined" ||(p != "equals" && this[p].toString() != x[p].toString())) {
            return false;
          }
          break;
        default:
          if (this[p] != x[p]) {
            return false;
          }
      }
    }
    else {
      if (x[p]) {
        return false;
      }
    }
  }
  
  for(p in x) {
    if(typeof(this[p])=="undefined") {
      return false;
    }
  }
  
  return true;
};


Array.prototype.inArray = function (value) {
  for (var i = 0; i < this.length; i++) {
    if (typeof value === "object") {
    
      // If both are objects, uses the equals function
      if (typeof this[i] === "object" && value.equals(this[i])) {
          return i;
      }
    }
    else if (this[i] === value) {
      return i;
    }
  }
  
  return false;
};


function toggleClass(id, className) {
  var element = document.getElementById(id);
  var classes = element.className.split(/s+/);
  var length = classes.length;
  var found = classes.inArray(className);
  
  if (found !== false) {
    classes.splice(found, 1);
  }
    
  // The className is not found
  if (length === classes.length) {
    classes.push(className);
  }
    
  element.className = classes.join(" ");
};