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：

复制代码 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;

function hasName( name )
            {
                var h = false;

if ( typeof name === 'string'
                    && name !== null
                    && name.trim() !== ''
                    && ar.length > 0 )
                {
                    for ( var i = 0; i < ar.length; i++ )
                    {
                        if ( ar[i].name === name )
                        {
                            h = true;
                            break;
                        }
                    }
                }

return h;
            }