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How can I convert an RGB image into grayscale in Python?
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SciPy's image I/O is literally PIL/Pillow. Hence, testing SciPy is effectively retesting PIL/Pillow with negligible overhead introduced by SciPy's wrapper functions. It would have been much more useful to substitute OpenCV (which does not leverage PIL...
Advantages to Using Private Static Methods
When creating a class that has internal private methods, usually to reduce code duplication, that don't require the use of any instance fields, are there performance or memory advantages to declaring the method as static?
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Do you need text/javascript specified in your tags?
...tribute is optional. Since Netscape 2, the default programming language in all browsers has been JavaScript. In XHTML, this attribute is required and unnecessary. In HTML, it is better to leave it out. The browser knows what to do.
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How to “grep” for a filename instead of the contents of a file?
...ts of the file). I will run this from the system's root directory, to find all those files that match the regular expression.
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How does Stack Overflow generate its SEO-friendly URLs?
...I benchmarked it). I figured I'd optimize it because this function can be called hundreds of times per page.
/// <summary>
/// Produces optional, URL-friendly version of a title, "like-this-one".
/// hand-tuned for speed, reflects performance refactoring contributed
/// by John Gietzen (user...
How to delete a word and go into insert mode in Vim?
...aw deletes the trailing space as well.
– Roberto Bonvallet
Sep 7 '09 at 4:38
5
:help objects in v...
AttributeError: 'module' object has no attribute 'urlopen'
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A Python 2+3 compatible solution is:
import sys
if sys.version_info[0] == 3:
from urllib.request import urlopen
else:
# Not Python 3 - today, it is most likely to be Python 2
# But note that this might need an update when Python 4
# might be around one day
from urlli...
How can I deploy an iPhone application from Xcode to a real iPhone device?
... do this a lot, be sure to check the other answers - you can make XCode do all the job to you but it's a troublesome procedure to trick it on doing that.
– cregox
Apr 16 '11 at 16:06
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How can I get the Typescript compiler to output the compiled js to a different directory?
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Though these answers are correct you should consider whether you actually just want to hide your .js files from your IDE.
In Visual Studio Code, go to File > Preferences > Settings or your .vscode\settings.json file and enter:
"files.exclude": {
"**/.git": true,
"**/.DS_Store"...
How to get the last N records in mongodb?
...need to sort in ascending order.
Assuming you have some id or date field called "x" you would do ...
.sort()
db.foo.find().sort({x:1});
The 1 will sort ascending (oldest to newest) and -1 will sort descending (newest to oldest.)
If you use the auto created _id field it has a date embedded in...