自己动手实现jQuery Callbacks完整功能代码详解

用法和$.Callbacks完全一致 ， 但是只是实现了add , remove , fire , empty, has和带参数的构造函数功能，  $.Callbacks 还有disable,disabled, fireWith , fired , lock, locked 方法

 代码如下：

  代码如下:
 String.prototype.trim = function ()
        {
            return this.replace( /^/s+|/s+$/g, '' );
        };

        // Simulate jQuery.Callbacks object
        function MyCallbacks( options )
        {
            var ops = { once: false, memory: false, unique: false, stopOnFalse: false };

            if ( typeof options === 'string' && options.trim() !== '' )
            {
                var opsArray = options.split( //s+/ );
                for ( var i = 0; i < options.length; i++ )
                {
                    if ( opsArray[i] === 'once' )
                        ops.once = true;
                    else if ( opsArray[i] === 'memory' )
                        ops.memory = true;
                    else if ( opsArray[i] === 'unique' )
                        ops.unique = true;
                    else if ( opsArray[i] === 'stopOnFalse' )
                        ops.stopOnFalse = true;
                }
            }

            var ar = [];
            var lastArgs = null;
            var firedTimes = 0;