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Select multiple columns in data.table by their numeric indices
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For versions of data.table >= 1.9.8, the following all just work:
library(data.table)
dt &...
Create a CSS rule / class with jQuery at runtime
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edited Sep 18 '13 at 8:37
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How to parse/read a YAML file into a Python object? [duplicate]
... Mayou36
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answered Jul 28 '11 at 22:49
user702846user702846
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What happens when a duplicate key is put into a HashMap?
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– roottraveller
Sep 20 '17 at 8:18
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How do I read an entire file into a std::string in C++?
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Hiding the legend in Google Chart
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answered Jan 30 '12 at 18:39
Trevor PesoutTrevor Pesout
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Measure the time it takes to execute a t-sql query
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edited Jul 26 '12 at 18:46
answered Jul 26 '12 at 18:00
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What is the purpose of the -nodes argument in openssl?
... indivindiv
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python max function using 'key' and lambda expression
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answered Aug 18 '13 at 7:41
Ashwini ChaudharyAshwini Chaudhary
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Position of least significant bit that is set
...3, 30, 22, 20, 15, 25, 17, 4, 8,
31, 27, 13, 23, 21, 19, 16, 7, 26, 12, 18, 6, 11, 5, 10, 9
};
r = MultiplyDeBruijnBitPosition[((uint32_t)((v & -v) * 0x077CB531U)) >> 27];
Helpful references:
"Using de Bruijn Sequences to Index a 1 in a Computer Word" - Explanation about why the abo...