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Compile time string hashing
...s is a little bit late, but I succeeded in implementing a compile-time CRC32 function with the use of constexpr. The problem with it is that at the time of writing, it only works with GCC and not MSVC nor Intel compiler.
Here is the code snippet:
// CRC32 Table (zlib polynomial)
static constexpr u...
Cython: “fatal error: numpy/arrayobject.h: No such file or directory”
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edited Oct 26 '14 at 15:54
DilithiumMatrix
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Variable name as a string in Javascript
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edited Oct 2 '17 at 8:53
Al.G.
3,72355 gold badges2929 silver badges4848 bronze badges
an...
Error on pod install
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234
If you landed here on or after January 30th 2014, there is a break in CocoaPods causing this. ...
How do I determine k when using k-means clustering?
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142
You can maximize the Bayesian Information Criterion (BIC):
BIC(C | X) = L(X | C) - (p / 2) * lo...
Key existence check in HashMap
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523
Do you ever store a null value? If not, you can just do:
Foo value = map.get(key);
if (value !...
How to use JavaScript variables in jQuery selectors?
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var name = this.name;
$("input[name=" + name + "]").hide();
OR you can do something like thi...
How to insert an item at the beginning of an array in PHP?
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284
Use array_unshift($array, $item);
$arr = array('item2', 'item3', 'item4');
array_unshift($arr...
How to execute a Ruby script in Terminal?
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251
Just call: ruby your_program.rb
or
start your program with #!/usr/bin/env ruby,
make your f...
How to check if a number is a power of 2
Today I needed a simple algorithm for checking if a number is a power of 2.
25 Answers
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