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Get a specific bit from byte
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Easy. Use a bitwise AND to compare your number with the value 2^bitNumber, which can be cheaply calculated by bit-shifting.
//your black magic
var bit = (b & (1 << bitNumber-1)) != 0;
EDIT: To add a little more detail because there are a lot of similar answers with no expla...
What's the simplest way to test whether a number is a power of 2 in C++?
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edited Dec 2 '15 at 3:59
jbranchaud
5,29977 gold badges3939 silver badges6969 bronze badges
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How to use/install gcc on Mac OS X 10.8 / Xcode 4.4
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423
Update:
You can now just run the following command from your terminal:
xcode-select --install...
Git flow release branches and tags - with or without “v” prefix
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edited May 23 '17 at 10:31
Community♦
111 silver badge
answered Feb 7 '14 at 23:52
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Pandas convert dataframe to array of tuples
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211
How about:
subset = data_set[['data_date', 'data_1', 'data_2']]
tuples = [tuple(x) for x in s...
How do I read CSV data into a record array in NumPy?
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edited Mar 2 '12 at 15:05
Mike Graham
60.5k1212 gold badges8484 silver badges119119 bronze badges
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Returning value from called function in a shell script
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282
A Bash function can't return a string directly like you want it to. You can do three things:
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How to check a string for specific characters?
...can I check if a string has several specific characters in it using Python 2?
5 Answers
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Pandas dataframe get first row of each group
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248
>>> df.groupby('id').first()
value
id
1 first
2 first
3 first
4...