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Named regular expression group “(?Pregexp)”: what does “P” stand for?
... I've always thought it stood for Python. That may sound pretty stupid -- what, P for Python?! -- but in my defense, I vaguely remembered this thread [emphasis mine]:
Subject: Claiming (?P...) regex syntax extensions
From: Guido van Rossum (gui...@CNRI.Reston.Va.US)
Date: Dec 10, 199...
What is the difference between `sorted(list)` vs `list.sort()`?
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What is the difference between sorted(list) vs list.sort()?
list.sort mutates the list in-place & returns None
sorted takes any iterable & returns a new list, sorted.
sorted is equivalent to this Python implement...
What should every programmer know about security? [closed]
...n anything about security. You certainly need to know enough to understand what you're doing and make sure you're using the tools correctly. However, if you ever find yourself about to start writing your own cryptography algorithm, authentication system, input sanitizer, etc, stop, take a step back,...
What is the difference between Ruby 1.8 and Ruby 1.9
...s is (mostly) built-in now
if statements do not introduce scope in Ruby.
What's changed?
Single character strings.
Ruby 1.9
irb(main):001:0> ?c
=> "c"
Ruby 1.8.6
irb(main):001:0> ?c
=> 99
String index.
Ruby 1.9
irb(main):001:0> "cat"[1]
=> "a"
Ruby 1.8.6
irb(main):...
What is the meaning of the term “free function” in C++?
...the documentation for boost::test, I came across the term "free function". What I understand is that a free function is any function that doesn't return anything (Its return type is void). But after reading further it seems that free functions also don't take any arguments. But I am not sure. These ...
How can I unstage my files again after making a local commit?
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git reset --soft HEAD~1 should do what you want. After this, you'll have the first changes in the index (visible with git diff --cached), and your newest changes not staged. git status will then look like this:
# On branch master
# Changes to be committed:
#...
What is the purpose of using -pedantic in GCC/G++ compiler?
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For whatever it is worth, and JFTR, I've mostly stopped using -pedantic, but most of my code still compiles OK when I re-enable it (the one program that didn't was explicitly using __int128 types, which are pedantically incorrect...
What is the id( ) function used for?
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Your post asks several questions:
What is the number returned from the function?
It is "an integer (or long integer) which is guaranteed to be unique and constant for this object during its lifetime." (Python Standard Library - Built-in Functions) A unique...
Iterate over object attributes in python
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@Meitham @Pablo What's wrong is mainly that you shouldn't need to do this. Which attributes you're interested in should be inclusive not exclusive. As you've already seen, you're including methods, and any attempt to exclude them will be fla...
Reference requirements.txt for the install_requires kwarg in setuptools setup.py file
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What if the user does not have pip installed? Ka-boom?
– Gringo Suave
Jul 28 '13 at 22:06
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