ramlite closure

Deep understanding of JavaScript series (16): closure (Closures), javascriptclosuresIntroduction In this chapter, we will introduce closure, a common topic in JavaScript ). In fact, we have all talked about closures. However, we should try to discuss the closure from a theoretical point of view to see how the closure i

JavaScript: closure (Closures)Introduction In this chapter, we will introduce closure, a common topic in JavaScript ). In fact, we have all talked about closures. However, we should try to discuss the closure from a theoretical point of view to see how the closure in ECMAScript actually works. As mentioned in the previ

The code is as follows:Copy code /*** The Code mentioned below is run in PHP5.3 or later.*/Function callback ($ callback ){$ Callback ();}// Output: This is a anonymous function. // An anonymous function is directly defined here for transfer. In previous versions, this is unavailable.// At present, this syntax is very comfortable. It is basically the same as the javascript syntax. The reason why it is basic needs to be further viewed.// Conclusion: a comfortable syntax is welcome.Callback (fu

What exactly is a JavaScript closure? With JavaScript for more than a year, closures always make a person two Zhang Monk touch the head. Land continued to come into contact with some of the closures of knowledge, have also made several times because do not understand the closure caused by the error, more than a year of data also read some, but still not very clear, recently happened to read the jquery Basi

Reprint Original Address: http://blog.csdn.net/lgg201/article/details/6127564 functioncallback($callback) {$callback();}//output: This is a anonymous function./n//Here is a direct definition of an anonymous function to pass, which is not available in previous versions.//Now, this syntax is very comfortable, and JavaScript syntax basically consistent, the reason is basically, need to continue to look down//Conclusion: a comfortable grammar is bound to be popular.Callback function() {Print

achieved by workaround. That is, in the interior of the function, define a function. JS Code 　　Function F1 () { n=999; function F2 () {alert (n); //999} } In the above code, the function F2 is included within the function F1, when all local variables within F1 are visible to F2. But the reverse is not, F2 internal variables, the F1 is not visible. This is the "chained scope" structure (chain scope) peculiar to the JavaScript language. The child object looks up the variables of all the p

[PHP]View PlainCopy /** * AUTHOR:SELFIMPR * Mail: [email protected] * blog:http://blog.csdn.net/lgg201 * The code mentioned below runs through the PHP5.3 version above. */ function callback ($callback) { $callback (); } Output: This is a anonymous function. Here is a direct definition of an anonymous function to pass, which is not available in previous versions. Now, this syntax is very comfortable, and JavaScript syntax basically consistent, the reason is basically

and can only be achieved by workaround. That is, in the interior of the function, define a function. Copy Code code as follows: Function F1 () { n=999; function F2 () { alert (n); 999 } } In the above code, the function F2 is included within the function F1, when all local variables within F1 are visible to F2. But the reverse is not, F2 internal variables, the F1 is not visible. This is the "chained scope" structure (chain scope) peculiar to the JavaScript lan

What is closure? One definition is: A "closure" is an expression (typically a function) that can have free variables together with an environment that binds those variables (that "closes" the expression ). My understanding is:ClosureIs an expression (usually a function), which corresponds toEnvironmentShared with some free variables, and thisEnvironmentThenBindWith those free variables (orEndThis ex