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Unique (non-repeating) random numbers in O(1)?
... = n, max starts off at 10:
+--+--+--+--+--+--+--+--+--+--+--+
| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9|10|
+--+--+--+--+--+--+--+--+--+--+--+
^
max
At each iteration, a random number r is selected between 0 and max, array[r] and array[max]...
Define preprocessor macro through CMake?
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3 Answers
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Performance of foreach, array_map with lambda and array_map with static function
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3 Answers
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How to check if a float value is a whole number
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13 Answers
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How do I choose grid and block dimensions for CUDA kernels?
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Pandas count(distinct) equivalent
...ple:
In [2]: table
Out[2]:
CLIENTCODE YEARMONTH
0 1 201301
1 1 201301
2 2 201301
3 1 201302
4 2 201302
5 2 201302
6 3 201302
In [3]: table.groupby('YEARMONTH').CLIENTCODE.nunique()
Out[3]:
YEARM...
Python JSON serialize a Decimal object
I have a Decimal('3.9') as part of an object, and wish to encode this to a JSON string which should look like {'x': 3.9} . I don't care about precision on the client side, so a float is fine.
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python pandas dataframe to dictionary
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answered Sep 9 '13 at 9:55
jorisjoris
94.6k3030 gold badges197197 silver badges171171 bronze badges
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Getting parts of a URL (Regex)
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153
A single regex to parse and breakup a
full URL including query parameters
and anchors e.g...
using awk with column value conditions
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132
If you're looking for a particular string, put quotes around it:
awk '$1 == "findtext" {print ...