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What is a semaphore?

...s bouncers at a nightclub. There are a dedicated number of people that are allowed in the club at once. If the club is full no one is allowed to enter, but as soon as one person leaves another person might enter. It's simply a way to limit the number of consumers for a specific resource. For exampl...
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ImportError: No module named matplotlib.pyplot

... installed on your machine, one is the standard python that comes with Mac OSX and the second is the one you installed with ports (this is the one that has matplotlib installed in its library, the one that comes with macosx does not). /usr/bin/python Is the standard mac python and since it doesn'...
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Reference: mod_rewrite, URL rewriting and “pretty links” explained

...rver doesn't have to be Apache, there are many other web servers which are all just programs which run persistently and are attached to a port which respond to HTTP requests. You can write one yourself. This paragraph was intended to divorce you from any notion that URLs directly equal files, which ...
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Disable activity slide-in animation when launching new activity?

... which launches another activity, via a button click. By default, on newer OS versions of android, the OS will animate the new activity sliding in from right to left. ...
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Syntax highlighting for Jade in Sublime Text 2?

... Thanks. Just for those who did not know it (me, for example), the packages folder on Linux is ~/.config/sublime-text-2/Packages – Elad Aug 29 '12 at 10:49 ...
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Fragment or Support Fragment?

... From my experience, using the same fragment implementation on all Android devices is a great advantage. I could not get rid of all NullPointerExceptions when state is saved on Android 4.0 using native fragments, with the support library they are all gone. Also I could not see any disadv...
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Eclipse Android and gitignore

... What I usually add to .gitignore is: bin gen bin and gen are constantly changed while coding, so there's no need to include them into the Git repository. Also, sometimes I add .classpath and .project which are Eclipse specific files...
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How do I get my C# program to sleep for 50 msec?

... There are basically 3 choices for waiting in (almost) any programming language: Loose waiting Executing thread blocks for given time (= does not consume processing power) No processing is possible on blocked/waiting thread Not so precise Tight waiting (also called tight...
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How to use the same C++ code for Android and iOS?

...nd to write specific code to each platform in this regard. In other hands, all logic code, business rules, and things that can be shared we intend to write using C++, so we can compile the same code to each platform. In the diagram, you can see the C++ layer at the lowest level. All shared code is ...
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Android, getting resource ID from string?

...con", R.drawable.class); // or other resource class I just found a blog post saying that Resources.getIdentifier() is slower than using reflection like I did. Check it out. share | improve this an...