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Multi-line commands in GHCi
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187
Most of the time, you can rely on type inference to work out a signature for you. In your exam...
[] and {} vs list() and dict(), which is better?
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198
In terms of speed, it's no competition for empty lists/dicts:
>>> from timeit import...
How to initialize all members of an array to the same value?
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1276
Unless that value is 0 (in which case you can omit some part of the initializer
and the corre...
See what process is using a file in Mac OS X
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edited Aug 10 '19 at 16:03
agillgilla
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Scala 2.8 breakOut
...e the best builder possible. For example, if I were to write Map('a' -> 1).map(_.swap), I'd like to get a Map(1 -> 'a') back. On the other hand, a Map('a' -> 1).map(_._1) can't return a Map (it returns an Iterable).
The magic of producing the best possible Builder from the known types of t...
John Carmack's Unusual Fast Inverse Square Root (Quake III)
...ulates the inverse square root of a float, 4x faster than regular (float)(1.0/sqrt(x)) , including a strange 0x5f3759df constant. See the code below. Can someone explain line by line what exactly is going on here and why this works so much faster than the regular implementation?
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sed: print only matching group
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140
Match the whole line, so add a .* at the beginning of your regex. This causes the entire line ...
I change the capitalization of a directory and Git doesn't seem to pick up on it
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