function map

gistfile1.js

<script type='text/javascript'>

var FuncPool = new function () {
  
    this.buffer    = new Object();
    
    // create set key
    this.createSetKey = function() {
    	var sKey = '';
    	while (true) {
            sKey = 'set' + (Math.random() + '').split('.')[1];
            if (this.buffer[sKey] == undefined) break;
        }
        return sKey;
    }
    
    this.addFunc = function(skey, func) {
    	if (this.buffer[skey] == undefined) {
    		this.buffer[skey] = {};
    	}
    	// create function key
    	var fkey = '';
    	while (true) {
    		fkey = 'func' + (Math.random() + '').split('.')[1];
            if (this.buffer[skey][fkey] == undefined) break;
        }
    	
    	 // create wrapper callback function
        this.buffer[skey][fkey] = function () {
            // invoke callback function
            try {
            	func.apply(this, [].slice.call(arguments));
            }
            catch (e) {
                console.log('Invoke callback function error : ', e);
            }

            // clear callback
            try {
                // is finish function then call back clear
                if (typeof(func.isFinFunc) == 'undefined' || func.isFinFunc == true) {
                    var cbSet = FuncPool.buffer[skey];
                    if (cbSet != undefined && cbSet != null) {
                        for (var key in cbSet) {
                            if (cbSet.hasOwnProperty(key)) {
                                delete FuncPool.buffer[skey][key];
                            }
                        }
                        delete FuncPool.buffer[skey];
                    }
                }
            }
            catch (e) {
            	console.log('fail to clear function : ', e);
            }
        };
        return 'FuncPool.buffer[\'' + skey + '\'][\'' + fkey + '\']'; 
    }
}



var kSet =FuncPool.createSetKey();
var cb_func = function(total,current) {
	console.log('total   : ' + total);
	console.log('current : ' + current);
}
cb_func.isFinFunc = false

var kFunc = FuncPool.addFunc(kSet, cb_func);
console.log(kFunc);
console.log(FuncPool.buffer);

eval(kFunc)(123,456)
console.log(kFunc);