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`require': no such file to load — mkmf (LoadError)
I was trying to install rails on Ubuntu Natty Narwhal 11.04, using ruby1.9.1.
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mongodb count num of distinct values per field/key
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MongoDB has a distinct command which returns an array of distinct values for a field; you can ...
Trying to understand CMTime and CMTimeMake
1) CMTimeMake(1,10) means duration of 1 second and timescale of 10, or 10 frames per second. This means 1s duration of video with 10 frames?
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What does $.when.apply($, someArray) do?
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.apply is used to call a function with an array of arguments. It takes each element in the ar...
“Conversion to Dalvik format failed with error 1” on external JAR
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Maven Install on Mac OS X
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OS X prior to Mavericks (10.9) actually comes with Maven 3 built in.
If you're on OS X Lion, you won't have java installed by default. Just run java by itself and it'll prompt you to install it.
Assuming qualifications are met, run mvn -version ...
How can I perform a reverse string search in Excel without using VBA?
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Difference between dispatch_async and dispatch_sync on serial queue?
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410
Yes. Using serial queue ensure the serial execution of tasks. The only difference is that dispa...