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How can I convert an RGB image into grayscale in Python?
...= rgb2gray(img)
plt.imshow(gray, cmap=plt.get_cmap('gray'), vmin=0, vmax=1)
plt.show()
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Url decode UTF-8 in Python
...ch handles decoding from percent-encoded data to UTF-8 bytes and then to text, transparently:
from urllib.parse import unquote
url = unquote(url)
Demo:
>>> from urllib.parse import unquote
>>> url = 'example.com?title=%D0%BF%D1%80%D0%B0%D0%B2%D0%BE%D0%B2%D0%B0%D1%8F+%D0%B7%D0%...
Java and SQLite [closed]
...rm JDBC driver which uses embedded native SQLite libraries on Windows, Linux, OS X, and falls back to pure Java implementation on other OSes: https://github.com/xerial/sqlite-jdbc (formerly zentus)
Another Java - SWIG wrapper. It only works on Win32. http://rodolfo_3.tripod.com/index.html
sqlite-jav...
What is the Oracle equivalent of SQL Server's IsNull() function?
... only caveat is that it doesn't necessarily perform as fast as native syntax.
– OMG Ponies
Aug 19 '10 at 17:33
17
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How do you get the width and height of a multi-dimensional array?
...
You use Array.GetLength with the index of the dimension you wish to retrieve.
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jquery-ui sortable | How to get it work on iPad/touchdevices?
... This works on Android tablet too. Specifically tested on a Samsung Galaxy tab 10.1 on Android 3.1.
– absynce
Jan 10 '12 at 20:50
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Waiting on a list of Future
...eceive the futures as soon as they are ready and if one of them throws an exception cancel the processing. Something like this:
Executor executor = Executors.newFixedThreadPool(4);
CompletionService<SomeResult> completionService =
new ExecutorCompletionService<SomeResult>(execut...
Default behavior of “git push” without a branch specified
...when the other branches are not yet ready to be pushed out
Command line examples:
To view the current configuration:
git config --global push.default
To set a new configuration:
git config --global push.default current
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Getting the first character of a string with $str[0]
... edited Aug 8 '17 at 4:14
Alexis Wilke
14.2k77 gold badges5151 silver badges9898 bronze badges
answered Dec 28 '09 at 23:31
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How does a debugger work?
...ugger work? Particulary the one that can be 'attached' to already running executable. I understand that compiler translates code to machine language, but then how does debugger 'know' what it is being attached to?
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