通过jQuery源码学习javascript（一）

(function(){
    var 
        _cQuery = window.cQuery,
        cQuery = function(){
            return new cQuery.fn.init();
        };  
    cQuery.fn = cQuery.prototype =  {
            init : function () {
　　　　　　　　  console.log(this);
                return this;
            },  
            test : function () {
                console.log('test');
            }   
        };  
    cQuery.fn.init.prototype =  cQuery.fn;
    window.C = window.cQuery = cQuery;
})();

C().test();

window.C = window.cQuery = cQuery;

cQuery.fn.init.prototype = cQuery.fn;

(function(){
    var
        _cQuery = window.cQuery,
        cQuery = function(){
            return new cQuery.fn.init();
        };
    cQuery.fn = cQuery.prototype =  {
            init : function () {
                return this;
            },  
            each : function(obj, callback) {    // each 方法
                var name, length = obj.length;  
                for (name in obj) {
                    if (callback.call(obj[name], name, obj[name]) === false) {
                        break;
                    }   
                }   
            },  
            isWindow : function(obj) {
                return obj != null && obj == obj.window;
            }   
        };  
    cQuery.fn.init.prototype =  cQuery.fn;
    window.C = window.cQuery =cQuery;
})();

C().each({ Height : 'height', Width : 'width'}, function(name, type){ console.log(this, name, type); });

 isWindow : function(obj) {
                return obj != null && obj == obj.window;
            }

console.log(cquery.isWindow(window));
console.log(cquery.isWindow(document));