 
 		public function toString() : String
 		{
-			return "(" + _vector.x + ", " + _vector.y + ", " + _vector.z + ", "
-				   + _vector.w + ")";
+			return '(' + _vector.x + ', ' + _vector.y + ', ' + _vector.z + ', ' + _vector.w + ')';
 		}
 
 		public static function scale(v : Vector4, s : Number, out : Vector4 = null) : Vector4

		{
			if (x != _vector.x || y != _vector.y || z != _vector.z || w != _vector.w)
			{
				_vector.x = x;
				_vector.y = y;
				_vector.z = z;
				_vector.w = w;

				_update = UPDATE_ALL;

			_changed.execute(this);

			return this;
		}
		
		public function lerp(target : Vector4, ratio : Number) : Vector4
		{
			if (ratio == 1.)
				return copyFrom(target);
			
			if (ratio != 0.)
			{
				var x : Number = _vector.x;
				var y : Number = _vector.y;
				var z : Number = _vector.z;
				var w : Number = _vector.w;
				
				set(
					x + (target._vector.x - x) * ratio,
					y + (target._vector.y - y) * ratio,
					z + (target._vector.z - z) * ratio,
					w + (target._vector.w - w) * ratio
				);
			}
			
			return this;
		}
		
		public function equals(v : Vector4, allFour : Boolean = false, tolerance : Number = 0.) : Boolean
		{
			return tolerance
				? _vector.nearEquals(v._vector, tolerance, allFour);
				: _vector.equals(v._vector, allFour)
		}

		public function project() : Vector4
