Javascript对象---对象名只是某个对象的引用，并不是副本

//对象名只是某个对象的引用，并不是副本。(function() {function a() {var k = {a : 1};var kk = 1;b(k,kk);console.log(k); //{a:2}console.log(kk); //1}function b(k,kk) {k.a = k.a + 1;kk = 2;}a();var obj1 = {},obj2 = {};var obj3 = obj4 = {};obj1 === obj2 && console.log("obj1 === obj2");obj1 == obj2 && console.log("obj1 == obj2");obj3 === obj4 && console.log("obj3 === obj4"); //obj3 === obj4})();

(function () {function kk() {var val = 1;var obj = {x:1};var arr = [1,2];function c() {return val + 1;}return {a : function() {console.log(val);},b : function() {this.a();console.log(c());},c : function () {return obj;},d : function () {return val;},f : function () {return arr;}};};var k1 = kk();k1.b();var o = k1.c(); //对obj的另一个引用console.log(o); //{x:1}o.x = 3; //对其修改相当对所引用的对象进行修改console.log(k1.c()); //{x:3}var v = k1.d(); //创建了val的副本console.log(v); //1v = 9; //副本的改变对val不影响console.log(k1.d()); //1var a = k1.f();console.log(a); //[1,2]a[1] = 9;console.log(k1.f()); //[1,9]a = [2,3]; //引用了另一个对象，对原来的引用不影响console.log(k1.f()); //[1,9]})();