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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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What's the difference between the atomic and nonatomic attributes?

What do atomic and nonatomic mean in property declarations? 26 Answers 26 ...
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ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired

...cked by some query. For example, you may have executed "select for update" and have not yet committed/rollbacked and fired another select query. Do a commit/rollback before executing your query. share | ...
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Does functional programming replace GoF design patterns?

Since I started learning F# and OCaml last year, I've read a huge number of articles which insist that design patterns (especially in Java) are workarounds for the missing features in imperative languages. One article I found makes a fairly strong claim : ...
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How to determine why visual studio might be skipping projects when building a solution

I am debugging someone else's work and the solution is quite large. When I try to build the entire thing, several projects within the solution don't build and just skip. Viewing the output window during the build process says: ...
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Insertion Sort vs. Selection Sort

I am trying to understand the differences between Insertion Sort and Selection Sort. 20 Answers ...
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Difference between PCDATA and CDATA in DTD

What is the difference between #PCDATA and #CDATA in DTD ? 6 Answers 6 ...
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iPad/iPhone hover problem causes the user to double click a link

...sites I built times ago, that use jquery mouse events...I just got an ipad and i noticed that all the mouse over events are translated in clicks...so for instance i have to do two clicks instead of one..(the first hover, than the actual click) ...
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Difference between solr and lucene

I know that Lucene and Solr are 2 differents Apache projects that are made to work together, but I don't understand what is the aim of each project. ...
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XMLHttpRequest cannot load file. Cross origin requests are only supported for HTTP

... If you are doing something like writing HTML and Javascript in a code editor on your personal computer, and testing the output in your browser, you will probably get error messages about Cross Origin Requests. Your browser will render HTML and run Javascript, jQuery, a...