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Updating packages in Emacs
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package-refresh-contents unconditionally tries to download a package list from all repos you've added to package-archives; package-archive-contents is non nil if you have already downloaded the package list.
ELPA is the original. I don't think it's really maintained anymore, but I'm not sure. I d...
Accessing inactive union member and undefined behavior?
...lid reference (other than answers claiming it's UB but without any support from the standard).
5 Answers
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fork() branches more than expected?
...However, what printf() really does is buffer its output. So the first dot from when there were only two processes does not appear when written. Those dots remain in the buffer—which is duplicated at fork(). It is not until the process is about to exit that the buffered dot appears. Four proces...
How to git reset --hard a subdirectory?
...for a path, replacing both the index and the working tree with the version from the HEAD commit.
As answered by Ajedi32, both checkout forms don't remove files which were deleted in the target revision.
If you have extra files in the working tree which don't exist in HEAD, a git checkout HEAD -- &...
Why doesn't the example compile, aka how does (co-, contra-, and in-) variance work?
Following on from this question , can someone explain the following in Scala:
4 Answers
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Where can I get a list of Ansible pre-defined variables?
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Argh! From the FAQ:
How do I see a list of all of the ansible_ variables?
Ansible by default gathers “facts” about the machines under management, and these facts can be accessed in Playbooks and in templates. To see a list of ...
What's the safest way to iterate through the keys of a Perl hash?
...a
problem. However, you will run into hard to track down problems (I speak from
experience ;), when using each together with statements like
last or return to exit from the while ... each loop before you
have processed all keys.
In this case, the hash will remember which keys it has already returne...
How can I add an ampersand for a value in a ASP.net/C# app config file value
...es not automatically unescape these &xyl; characters when getting them from the config file.
– Efrain
Oct 27 '17 at 12:16
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How to change color in markdown cells ipython/jupyter notebook?
...that, is to enter a LaTeX environment within the notebook and change color from there (which is great if you are more fluent in LaTeX than in HTML). Example:
$\color{red}{\text{ciao}}$
would display ciao in red.
share
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Turn off CSRF token in rails 3
...e a mix of regular browser-accessible forms and API endpoints. The answer from Markus Proske would be correct if you were absolutely sure you were not going to have any browser-accessible forms in your app.
– Asfand Qazi
Jul 9 '14 at 10:44
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