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function test(){function test(){}}

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Mar 03.2006

[CODE]version1
function test(){function test(){…}}
test=new test()[/CODE]
[CODE]version2
function test(){}
test.prototype.test=function(){…}
test=new test()[/CODE]

are both versions equal ?

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JavaScript

7 Comments(s) ↴

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@QuentinMar 03.2006 — You can't have a function declared inside of a function this way.

[CODE]function test() {
function test() {}
}[/CODE]

You can however use

[CODE]function test() {}
test.prototype.test = function() {}[/CODE]

or

[CODE]function test() {
this.test = function() {}
}[/CODE]

and get the same result.
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@gert_cuykensauthorMar 03.2006 — hmm i think i will just stick with the prototype version ?
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@BrainEaterMar 03.2006 — function CustomObject(){
var privateVar='private';
var self=this;
this.publicVar='public';
function privateFunc(){alert('private functions can access variable and functions,n both '+privateVar+' and '+self.publicVar+' (though theynneed the "self" trick to get the public/priviledge ones)')}
this.priviledgedFunc=function(){
alert('priviledged functions can access variable and functions,n both '+privateVar+' and '+this.publicVar)
privateFunc()
}
}
CustomObject.prototype.publicFunc=function(){
try{
alert('public functions can access variable and functions,n both '+privateVar+' and '+this.publicVar)
}
catch(error){
alert('public functions can only access variablesnand functions that are '+this.publicVar+'. Trying tonget private variables gives the error:n"'+error.toString()+'"')
}
}

ob=new CustomObject();
ob.priviledgedFunc();
ob.publicFunc();
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@gert_cuykensauthorMar 03.2006 — sometimes i hate javascript you know ?
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@QuentinMar 03.2006 — Really the main difference between the two are this...

Lets say you create a class:

[CODE]function test() {}[/CODE]

and within this class you want some certain functions and variables. Then you want to inherit this class

[CODE]var mytest = new test();[/CODE]

but then you want to add a function to mytest without having to add this function to the entire test class. So thats where prototype comes into play.

[CODE]var mytest = new test();
mytest.prototype.test = function() {

}[/CODE]
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@gert_cuykensauthorMar 03.2006 — i understand but it is so different from php and when using php to generate javascript its like driving a car from europe to england where europe is php and england js ?
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@gert_cuykensauthorMar 05.2006 — you know after reading this treath 236 times it makes alot of sence actualy

prototypes are like the extentions of firefox you can download and install ?
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