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Determine if Python is running inside virtualenv
...d or supported by most Python 3 frameworks and applications, this function now reduces to a trivial one-liner: def is_venv(): return hasattr(sys, 'real_prefix') or sys.base_prefix != sys.prefix. Just sayin'.
– Cecil Curry
Nov 13 '19 at 6:36
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How do I limit the number of returned items?
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Thanks a lot, didn't know you could make queries like that. Where can I find some form of documentation about this execFind method ?
– Running Turtle
Apr 29 '11 at 14:18
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How to concatenate string variables in Bash
...aces, tabulations and/or newlines
printf -v foo "%s World" "$foo"
Shell now
Under POSIX shell, you could not use bashisms, so there is no builtin printf.
Basically
But you could simply do:
foo="Hello"
foo="$foo World"
echo $foo
Hello World
Formatted, using forked printf
If you want to use ...
Why is it string.join(list) instead of list.join(string)?
...ace UCS2/4. To calculate total buffer length of UTF-8 strings it needs to know character coding rule.
At that time, Python had already decided on a common sequence interface rule where a user could create a sequence-like (iterable) class. But Python didn't support extending built-in types until 2.2....
What is the difference between memoization and dynamic programming?
...recurses down to solve the sub-problems).
A good slide from here (link is now dead, slide is still good though):
If all subproblems must be solved at least once, a bottom-up dynamic-programming algorithm usually outperforms a top-down memoized algorithm by a constant factor
No overhe...
Capybara Ambiguity Resolution
...mum necessary time. Using first as suggested above, unless you absolutely know what you're doing, is likely to result in specs that pass for you but fail in a CI build or on a colleague's machine.
– jim
Oct 8 '14 at 23:42
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Django: How do I add arbitrary html attributes to input fields on a form?
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Good! No need to explicitly define all widgets now.
– Mikael Lindlöf
Feb 2 '16 at 7:53
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How to get ID of the last updated row in MySQL?
...DATE table SET id=LAST_INSERT_ID(id), row='value' WHERE other_row='blah';. Now, SELECT LAST_INSERT_ID(); will return the updated id. See newtover's answer for more details.
– Joel
Jun 2 '14 at 14:35
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Notepad++ Multi editing
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Notepad++ also handles multiple cursors now.
Go into Settings => Preferences => Editing and check "Enable" in "Multi editing settings"
Then, just use Ctrl+click to use multiple cursors.
Feature demo on official website here : https://notepad-plus-plus.org/...
Face recognition Library [closed]
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Update
OpenCV 2.4.2 now comes with the very new cv::FaceRecognizer. Please see the very detailed documentation at:
http://docs.opencv.org/2.4/modules/contrib/doc/facerec/index.html
Original Post
I have released libfacerec, a modern face rec...