I have a little bit of experience in JavaScript but JavaScript Closure makes me confused.
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1Java Closure or JavaScript closures? – Šime Vidas Apr 01 '11 at 18:50
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Javascript Closures and Javascript – linlin Apr 01 '11 at 18:55
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do you mean closures, as in the language construct, or Closure, as in the google code project for compiling JavaScript? http://code.google.com/p/closure-compiler/ – Jerod Venema Apr 01 '11 at 19:02
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@jvenema thanks, I have never seen this link – linlin Apr 01 '11 at 19:20
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2Zero votes. Zero answers accepted. If you don't get help this might be the reason, so consider improving it. – Shadow The GPT Wizard Apr 01 '11 at 20:07
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Is this what you are looking for? https://stackoverflow.com/questions/111102/how-do-javascript-closures-work – SavoryBytes Apr 01 '11 at 19:21
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To understand what the closure is going to do, you need to understand the scope of local variables.
In Java, you can declare a new, distinct local variable in any {} block.
In Javascript, there is different behavior. The interpreter allows declaring a local variable anywhere, but these variables will only be distinct if they are in different functions.
There is no loop scope or loop-defined variables in Javascript, so for(x=0;x<10;x++){ var j=... behaves exactly like var j; for(x=0; x<10; x++){ j = ..
This is why in Javascript one often wraps one function in another function in order to create a well behaved scope.
Paul
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you means like write the function in jquery or Is it smiliar jquery, javascript closure and Ajax? – linlin Apr 01 '11 at 19:08
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1jQuery is a library of prewritten JavaScript. A closure is a language construct. Ajax is the technique of using JS to communicate with a webserver. You are comparing a motor parts shop to an engine and to driving to the beach. – Quentin Apr 01 '11 at 19:21