Comment Feed for Channel 9 - Fundamentals of JavaScript Closures - 20 http://media.ch9.ms/ch9/cdd4/7ac74d10-e1f5-44d3-89fb-60c9a895cdd4/20FundamentalsofJavaScriptClosures_220.jpg Channel 9 - Fundamentals of JavaScript Closures - 20 Closures are a slightly advanced topic, but are at the core simply a means by which you can marry a function along with its environment variables and input parameters. This video demonstrates the basics of closures as a first step toward mastering this important structure in JavaScript. en Thu, 20 Jun 2013 11:13:05 GMT Thu, 20 Jun 2013 11:13:05 GMT Rev9 Re: Fundamentals of JavaScript Closures - 20 posted by marilda

]]> http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c634803714681167656 Sun, 12 Aug 2012 12:31:08 GMT http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c634803714681167656 marilda Re: Fundamentals of JavaScript Closures - 20 posted by Jags

]]> http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c634820017358555252 Fri, 31 Aug 2012 09:22:15 GMT http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c634820017358555252 Jags Re: Fundamentals of JavaScript Closures - 20 posted by Stegee

]]> http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c634881607318607845 Sat, 10 Nov 2012 16:12:11 GMT http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c634881607318607845 Stegee Re: Fundamentals of JavaScript Closures - 20 @Stegee: Have you seen this?

http://channel9.msdn.com/Series/Windows-Phone-7-Development-for-Absolute-Beginners

posted by BobTabor

]]> http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c634883352478011136 Mon, 12 Nov 2012 16:40:47 GMT http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c634883352478011136 BobTabor Re: Fundamentals of JavaScript Closures - 20
As you say however, knowing when to use it is another matter. ;)

posted by skube

]]> http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c634924781424666930 Sun, 30 Dec 2012 15:29:02 GMT http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c634924781424666930 skube Re: Fundamentals of JavaScript Closures - 20 The series is fantastic! Just found these in the app store and
I really appreciate the easy going and fresh approach to the videos!!!
Question. I think I am getting the concept of closures and began experimenting in the browser.
From what I understand, it's a way of porting functions and all it's related values to another variable/context? The global space???
Anyway, I have input this in the chrome dev tools:

function f(){
var b = "b";
return function(){
return b;
}
}

var n = f();
n();
"b" // <-- got this
I figure this means I have attached this function to the global scope and saved all the info for that function into a new context?

But when I ran just f(); I got this...
function (){
return b;
}
I have no idea what that means!!!

Anyway, thanks again for a terrific tool for learning javaScript!

posted by antonio

]]> http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c634986182965438320 Mon, 11 Mar 2013 17:04:56 GMT http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c634986182965438320 antonio Re: Fundamentals of JavaScript Closures - 20 The series is fantastic! Just found these in the app store and
I really appreciate the easy going and fresh approach to the videos!!!
Question. I think I am getting the concept of closures and began experimenting in the browser.
From what I understand, it's a way of porting functions and all it's related values to another variable/context? The global space???
Anyway, I have input this in the chrome dev tools:

function f(){
var b = "b";
return function(){
return b;
}
}

var n = f();
n();
"b" // <-- got this
I figure this means I have attached this function to the global scope and saved all the info for that function into a new context?

But when I ran just f(); I got this...
function (){
return b;
}
I have no idea what that means!!!

Anyway, thanks again for a terrific tool for learning javaScript!

posted by antonio

]]> http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c634986184183250819 Mon, 11 Mar 2013 17:06:58 GMT http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c634986184183250819 antonio Re: Fundamentals of JavaScript Closures - 20 @skube: Awesome feedback, thanks!

@antonio: App store?  Channel9's or ... ?  

As far as your question goes ... would you do me a favor and create a jsFiddle example?  I'm having a hard time parsing through this in the comments.  It would be easier to see it in jsFiddle and play around with it and try to figure it out there before I comment.  Thanks!!!

posted by BobTabor

]]> http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c634986188003366620 Mon, 11 Mar 2013 17:13:20 GMT http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c634986188003366620 BobTabor Re: Fundamentals of JavaScript Closures - 20 Thanks for responding!!!! I found the series in the mac app store...

Here is the example...
http://jsfiddle.net/antonio_ortiz/LUJpF/2/

Again, very cogent and succinct series for the newb...

posted by antonio

]]> http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c634986226611384979 Mon, 11 Mar 2013 18:17:41 GMT http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c634986226611384979 antonio Re: Fundamentals of JavaScript Closures - 20 @antonio: Try this:

http://jsfiddle.net/LUJpF/3/

It's based on your closure example ... I think the key concept is that we create a "factory" along with all variables it needs to produce a given result.  I've created two such results from the same factory ... bob() and steve().  Now, I can run bob() and steve() whenever I need an implementation of that function specific to "Bob" or "Steve".

posted by BobTabor

]]> http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c634986293118657582 Mon, 11 Mar 2013 20:08:31 GMT http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c634986293118657582 BobTabor Re: Fundamentals of JavaScript Closures - 20 Hi Bob,

The example on jsFIDDLE was so blur...Are there any places I can get the code? Thank you.

posted by Yumikokk

]]> http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c635025149279364138 Thu, 25 Apr 2013 19:28:47 GMT http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c635025149279364138 Yumikokk Re: Fundamentals of JavaScript Closures - 20 @Yumikokk: If you have problems streaming the video, try downloading.  The should be as crystal clear as this text I type.  (I agree ... for some reason, this streaming video is fuzzy).

http://jsfiddle.net/vnkuZ/

posted by BobTabor

]]> http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c635025867630976829 Fri, 26 Apr 2013 15:26:03 GMT http://channel9.msdn.com/Series/Javascript-Fundamentals-Development-for-Absolute-Beginners/Fundamentals-of-JavaScript-Closures-20#c635025867630976829 BobTabor