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C++11 reverse range-based for-loop
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This is a very similar in idea to @Paul's solution. Due to things missing from C++11, that solution is a bit unnecessarily bloated (plus defining in std smells). Thanks to C++14 we can make it a lot more readable.
The key observation is that range-based for-loops work by relying on begin() and end...
How can I sort generic list DESC and ASC?
... @onedaywhen Sure; you'll see it anywhere you see editing described. From the help center, "When should I edit posts? [...] To clarify the meaning of the post (without changing that meaning)"
– Servy
Mar 18 '15 at 13:54
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How to use Active Support core extensions
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Does this work from the console? This is working for me:
$ sw_vers
ProductName: Mac OS X
ProductVersion: 10.6.5
BuildVersion: 10H574
$ rails c
Loading development environment (Rails 3.0.3)
>> 1.week.ago
=> Sun, 14 Nov 2010 1...
What is a Lambda?
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Clipped from wikipedia: http://en.wikipedia.org/wiki/Lambda#Lambda.2C_the_word
In programming languages such as Lisp and Python, lambda is an operator used to denote anonymous functions or closures, following lambda calculus usage.
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How do I conditionally apply CSS styles in AngularJS?
... 'fa-google' : type === 3 }"></i>
Icons from Font Awesome
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Can existing virtualenv be upgraded gracefully?
...e:
python -m venv --upgrade YOUR_VENV_DIRECTORY
I just upgraded my venv from Python 3.7.x to 3.8 on several projects without any issue.
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follo...
Preserve colouring after piping grep to grep
...e with your downstream program.
But if you want colorized output emanating from earlier commands, you need to force color codes to be produced regardless of the output sink. The forcing mechanism is program-specific.
Git: use -c color.status=always
git -c color.status=always status | grep -v .DS_Sto...
How to close off a Git Branch?
... running git push origin :branchname. To fix a new issue later, branch off from master again.
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How to use a custom comparison function in Python 3?
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A complete python3 cmp_to_key lambda example:
from functools import cmp_to_key
nums = [28, 50, 17, 12, 121]
nums.sort(key=cmp_to_key(lambda x, y: 1 if str(x)+str(y) < str(y)+str(x) else -1))
compare to common object sorting:
class NumStr:
def __init__(self, v)...
Clone contents of a GitHub repository (without the folder itself)
...reates the .git directory in your current folder, not just the source code from your project.
This optional [directory] parameter is documented in the git clone manual page, which points out that cloning into an existing directory is only allowed if that directory is empty.
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