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Why does python use 'else' after for and while loops?
...to seasoned Python coders. When used in conjunction with for-loops it basically means "find some item in the iterable, else if none was found do ...". As in:
found_obj = None
for obj in objects:
if obj.key == search_key:
found_obj = obj
break
else:
print('No object found.')
...
Is it possible to install another version of Python to Virtualenv?
I have a shared account in a web-hosting that has Python 2.4 installed, but my code is not compatible with 2.4. Is it possible to install Python 2.6 directly to Virtualenv?
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Streaming via RTSP or RTP in HTML5
...
Technically 'Yes'
(but not really...)
HTML 5's <video> tag is protocol agnostic—it does not care. You place the protocol in the src attribute as part of the URL. E.g.:
<video src="rtp://myserver.com/path/to/stream">
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How to have conditional elements and keep DRY with Facebook React's JSX?
How do I optionally include an element in JSX? Here is an example using a banner that should be in the component if it has been passed in. What I want to avoid is having to duplicate HTML tags in the if statement.
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Break or return from Java 8 stream forEach?
... This works if finding an object was the goal, but that goal is usually served by a return statement from a findSomething method. break is more usually associated with a take while-kind of operation.
– Marko Topolnik
Apr 26 '14 at 19:53
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How to get HttpClient to pass credentials along with the request?
...Bytes(data));
}
}
catch (Exception exc)
{
// handle exception
}
finally
{
wic.Undo();
}
Note: Requires NuGet package: Newtonsoft.Json, which is the same JSON serializer WebAPI uses.
share
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Is there a way to create xxhdpi, xhdpi, hdpi, mdpi and ldpi drawables from a large scale image?
...pi, xhdpi, hdpi, mdpi and ldpi drawables from a large scale image automatically? For example assume that I have a 512x512 image and I want to have different versions of this images for different screen resolutions supported by Android in appropriate folders.
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Executing Shell Scripts from the OS X Dock?
...ng the command, exiting after it completes.
The benefit to this is it's really simple to do, and you can very easily get user input (say, selecting a bunch of files), then pass it to the input of the shell script (either to stdin, or as arguments).
(Automator is in your /Applications folder!)
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Elegant way to check for missing packages and install them?
...em are novice/intermediate R users and don't realize that they have to install packages they don't already have.
29 Answers...
Render HTML to an image
... which already has a lot of answers, yet I still spent hours trying to actually do what I wanted:
given an html file, generate a (png) image with transparent background from the command line
Using Chrome headless (version 74.0.3729.157 as of this response), it is actually easy:
"/Applications/G...