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When do I use fabs and when is it sufficient to use std::abs?
...your code will work as expected on windows but will use the int version on linux, which can be incredibly hard to debug.
– Adversus
Nov 3 '15 at 8:52
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Read specific columns from a csv file with csv module?
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Context: For this type of work you should use the amazing python petl library. That will save you a lot of work and potential frustration from doing things 'manually' with the standard csv module. AFAIK, the only people who still use the csv module are those who have not yet discove...
Multi-line commands in GHCi
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From a Linux shell, echo ':set +m' >> ~/.ghci to make this setting persistent.
– eigenfield
Nov 1 '18 at 21:32
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How to remove all rows in a numpy.ndarray that contain non-numeric values
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Not the answer you're looking for? Browse other questions tagged python numpy or ask your own question.
How to take column-slices of dataframe in pandas
...at']
# foo bar quz ant cat sat
.loc accepts the same slice notation that Python lists do for both row and columns. Slice notation being start:stop:step
# slice from 'foo' to 'cat' by every 2nd column
df.loc[:, 'foo':'cat':2]
# foo quz cat
# slice from the beginning to 'bar'
df.loc[:, :'bar']
# f...
Select between two dates with Django
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Temporarily disable auto_now / auto_now_add
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For those looking at this when they are writing tests, there is a python library called freezegun which allows you to fake the time - so when the auto_now_add code runs, it gets the time you actually want. So:
from datetime import datetime, timedelta
from freezegun import freeze_time
wit...
How to print binary tree diagram?
...t prints all kinds of trees. Solution is inspired by the "tree" command in linux.
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Is it worthwile to learn assembly language? [closed]
...t languages, from lots of different paradigms. Learning Java, C++, C#, and Python doesn't count, since they are all instances of the same paradigm.
As assembly is at the root (well, close to the root) of all languages, I for one say that it is worthwhile to learn assembly.
Then again, it's worthw...
What is the difference between “long”, “long long”, “long int”, and “long long int” in C++?
...puter architecture and operating system. For example, a long is 64 bits on Linux and 32 bits on Windows (this was done to keep backwards-compatability, allowing 32-bit programs to compile on 64-bit Windows without any changes).
It is considered good C++ style to avoid short int long ... and instead...