JS utils

Array prototype

Array.prototype.contains = function(obj) {
  var i = this.length;
  while (i--) {
    if (this[i] === obj) {
      return true;
    }
  }
  return false;
}


  Array.prototype.max = function() {

    return Math.max.apply(null, this);

  };

  Array.prototype.min = function() {

    return Math.min.apply(null, this);
    
  };

  Array.prototype.remove = function() {
    
    var what, a = arguments, L = a.length, ax;

    while ( L && this.length ) {
      what = a[--L];
    
      while( ( ax = this.indexOf( what ) )!= -1 ){
        this.splice(ax, 1);
      }
    
    }
    
    return this;

  }

Object prototype

Object.prototype.isEmpty = function() {
  return Object.keys(this).length == 0;
}

Object.prototype.hasProp = function( propName ) {
  return this.isEmpty() ? false : Object.keys(this).contains(propName);
}