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GPL and LGPL open source licensing restrictions [closed]

I am having trouble understanding the usage permissions of open source. I read somewhere that GPL or LGPL enforces that software that uses GPL software must also be released open-source. I want to create an application that uses some open-source image recognition library. Can I sell this application...
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iOS5 Storyboard error: Storyboards are unavailable on iOS 4.3 and prior

...mall app using storyboards and it ran great. Just before final testing I decided to try it out to see if it runs on iOS 4.3. I clicked on the gray 5.0 in the project settings and selected 4.3. ...
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Dot character '.' in MVC Web API 2 for request such as api/people/STAFF.45287

The URL I'm trying to let work is one in the style of: http://somedomain.com/api/people/staff.33311 (just like sites as LAST.FM allow all sort of signs in their RESTFul & WebPage urls, for example " http://www.last.fm/artist/psy'aviah " is a valid url for LAST.FM). ...
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Archiving project in Xcode incorrectly creates multi-application bundle

Archiving my project in Xcode is creating a multi-application bundle, instead of bundling my main target for release, which is what I want. Specifically, when I validate my archive in Organizer, it gives me the message: ...
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What good technology podcasts are out there?

Yes, Podcasts, those nice little Audiobooks I can listen to on the way to work. With the current amount of Podcasts, it's like searching a needle in a haystack, except that the haystack happens to be the Internet and is filled with too many of these "Hot new Gadgets" stuff :( ...
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Recover from git reset --hard?

Is there any way to recover uncommitted changes to the working directory from a git reset --hard HEAD ? 22 Answers ...
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How to create multidimensional array

Can anyone give me a sample/example of JavaScript with a multidimensional array of inputs? Hope you could help because I'm still new to the JavaScript. ...
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Using jQuery to center a DIV on the screen

How do I go about setting a <div> in the center of the screen using jQuery? 28 Answers ...
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Abort Ajax requests using jQuery

Is it possible that using jQuery, I cancel/abort an Ajax request that I have not yet received the response from? 17 Answe...
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memcpy() vs memmove()

I am trying to understand the difference between memcpy() and memmove() , and I have read the text that memcpy() doesn't take care of the overlapping source and destination whereas memmove() does. ...