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Jinja2 template variable if None Object set a default value
...ld downvote this, since it's not a good answer to the original question... and yet at the same time, knowing about default is exactly what I needed for my particular case, so... simply not voting. (An edit to this answer might well earn it an upvote, except that I think it's likely hard to apply de...
How to check if a string contains a substring in Bash
... that spaces in the needle string need to be placed between double quotes, and the * wildcards should be outside. Also note that a simple comparison operator is used (i.e. ==), not the regex operator =~.
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Python Anaconda - How to Safely Uninstall
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From the docs:
To uninstall Anaconda open a terminal window and remove the entire
anaconda install directory: rm -rf ~/anaconda. You may also edit
~/.bash_profile and remove the anaconda directory from your PATH
environment variable, and remove the hidden .condarc file and
.co...
How to remove multiple deleted files in Git repository
I have deleted some files and git status shows as below.
16 Answers
16
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How to make a python, command-line program autocomplete arbitrary things NOT interpreter
...import readline
def completer(text, state):
options = [i for i in commands if i.startswith(text)]
if state < len(options):
return options[state]
else:
return None
readline.parse_and_bind("tab: complete")
readline.set_completer(completer)
The official module docs ar...
bundle install fails with SSL certificate verification error
...icate verification error
gem update --system
My answer is still correct and left below for reference if that ends up not working for you.
Honestly the best temporary solution is to
[...] use the non-ssl version of rubygems in your gemfile as a temporary workaround.
via user Ownatik
wha...
How to get the number of characters in a std::string?
...not going to get much help with anything from the std library, so you can handle rolling your own strlen as well. For wstring, u16string and u32string, it returns the number of characters, rather than bytes. (Again with the proviso that if you are using a variable-length encoding in any of those, ...
What is a regular expression for a MAC Address?
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The standard (IEEE 802) format for
printing MAC-48 addresses in
human-friendly form is six groups of
two hexadecimal digits, separated by
hyphens - or colons :.
So:
^([0-9A-Fa-f]{2}[:-]){5}([0-9A-Fa-f]{2})$
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What is the difference between a process and a thread?
What is the technical difference between a process and a thread?
35 Answers
35
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How to erase the file contents of text file in Python?
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#include<fstream> and then std::ofstream("file.txt"); about as short as in Python. :)
– wilhelmtell
May 4 '10 at 21:44
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