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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
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1 function MyObject(){ 2 // private variables and functions 3 var privateVariable = 10; 4 5 function privateFunction(){ 6 return false; ... 阅读全文
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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
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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
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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
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********************* from Professional JavaScript for Web DevelopmentExecution Context And Scope The execution context of a variable or function def... 阅读全文
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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
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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
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Prototype Chaining Recall the relationship between consructors, prototypes and instances: each constructor has a prototype object that points back to... 阅读全文
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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