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How Big can a Python List Get?
...answered May 12 '09 at 23:48
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What good are SQL Server schemas?
...a SQL 2000 guy and I've always been confused by schemas in 2005+. Yes, I know the basic definition of a schema, but what are they really used for in a typical SQL Server deployment?
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MySQL Fire Trigger for both Insert and Update
...cedure.html (which includes some examples) and asking your own question(s) if needed.
– derobert
Jul 1 '11 at 5:21
2
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printf with std::string?
...rloading:
std::cout << "Follow this command: " << myString;
If, for some reason, you need to extract the C-style string, you can use the c_str() method of std::string to get a const char * that is null-terminated. Using your example:
#include <iostream>
#include <string>
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Converting pixels to dp
...tan is saying: this is dangerous and you shouldn't be using it, especially now when device form factors are becoming so complex.
– Saket
Aug 5 '19 at 17:50
add a comment
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How do I get the row count of a pandas DataFrame?
...erty or just len(DataFrame.index). However, there are notable performance differences ( len(DataFrame.index) is fastest).
Code to reproduce the plot:
import numpy as np
import pandas as pd
import perfplot
perfplot.save(
"out.png",
setup=lambda n: pd.DataFrame(np.arange(n * 3).reshape(n, ...
libpng warning: iCCP: known incorrect sRGB profile
...CCP chunk from the PNG image.
Some applications treat warnings as errors; if you are using such an application you do have to remove the chunk. You can do that with any of a variety of PNG editors such as ImageMagick's
convert in.png out.png
To remove the invalid iCCP chunk from all of the PNG ...
What's the difference between URI.escape and CGI.escape?
...es how data should be encoded/decode between web server and application.
Now, let's say that you need to escape a URI in your app. It is a more specific use case.
For that, the Ruby community used URI.escape for years. The problem with URI.escape was that it could not handle the RFC-3896 spec.
UR...
What is difference between sjlj vs dwarf vs seh?
...n Handling (SEH)
Windows uses its own exception handling mechanism known as Structured Exception Handling (SEH). [...]
Unfortunately, GCC does not support SEH yet. [...]
See also:
Exception handling models of GCC
C++ Exception Handling for IA-64
EH newbies howto
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Filter dataframe rows if value in column is in a set list of values [duplicate]
... string
... '600141' ...
... '600329' ...
... ... ...
Suppose now we have a list of strings which we want the values in 'STK_ID' to end with, e.g.
endstrings = ['01$', '02$', '05$']
We can join these strings with the regex 'or' character | and pass the string to str.contains to filte...