林大勇

摘要： Any variable defined inside a function is considered private since it is inaccessable outside that function. This includes function arguments, local... 阅读全文

摘要： 1 function MyObject(){ 2 // private variables and functions 3 var privateVariable = 10; 4 5 function privateFunction(){ 6 return false; ... 阅读全文

摘要： The basic syntax of an anoymous function used as a block scope (often called a private scope) is as follows:(function(){ // block code here}) ();A va... 阅读全文

摘要： 我是这么理解的； (object.getName = object.getName)，这条语句在执行结束后，返回的是右操作数object.getName； 但是关键是这个右操作数现在放在哪里 ？ 我猜想因为这条语句是在全局中执行的，所以在全局中会有一个临时的变量，不妨命名为temp； 且temp =... 阅读全文

摘要： 然后第二段代码执行过程中，有1个globalvariabeobject，1个createFunctionactivationobject，10个anonymousfunction1activationobject，10个anonymousfunction2activationobject，并且这10... 阅读全文

摘要： ********************* from Professional JavaScript for Web DevelopmentExecution Context And Scope The execution context of a variable or function def... 阅读全文

摘要： One of the key characteristics of function declarations is function declaration hoisting, whereby function declarations are read before the code exc... 阅读全文

摘要： Although using the object constructor or an object literal are convenient ways to create single objects, there is an obvious downside: creating mult... 阅读全文

摘要： Prototype Chaining Recall the relationship between consructors, prototypes and instances: each constructor has a prototype object that points back to... 阅读全文

摘要： ECMAScript variables may contains two different types of data: primitive values and reference values. Primitive values are simple atomic pieces of d... 阅读全文