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Convert RGBA PNG to RGB with PIL
...ere's a version that's much simpler - not sure how performant it is. Heavily based on some django snippet I found while building RGBA -> JPG + BG support for sorl thumbnails.
from PIL import Image
png = Image.open(object.logo.path)
png.load() # required for png.split()
background = Image.new(...
Set every cell in matrix to 0 if that row or column contains a 0
Given a NxN matrix with 0s and 1s. Set every row that contains a 0 to all 0 s and set every column that contains a 0 to all 0 s.
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Sanitizing strings to make them URL and filename safe?
I am trying to come up with a function that does a good job of sanitizing certain strings so that they are safe to use in the URL (like a post slug) and also safe to use as file names. For example, when someone uploads a file I want to make sure that I remove all dangerous characters from the name.
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Can a variable number of arguments be passed to a function?
In a similar way to using varargs in C or C++:
6 Answers
6
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Update R using RStudio
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You install a new version of R from the official website.
RStudio should automatically start with the new version when you relaunch it.
In case you need to do it manually, in RStudio, go to :Tools -> options -> Genera...
Are duplicate keys allowed in the definition of binary search trees?
I'm trying to find the definition of a binary search tree and I keep finding different definitions everywhere.
12 Answers
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Odd behavior when Java converts int to byte?
Mindboggling. Why is the output -124 ?
11 Answers
11
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Are Java static initializers thread safe?
I'm using a static code block to initialize some controllers in a registry I have. My question is therefore, can I guarantee that this static code block will only absolutely be called once when the class is first loaded? I understand I cannot guarantee when this code block will be called, I'm guessi...
Does SVG support embedding of bitmap images?
Is an SVG image purely vectorial or can we combine bitmap images into an SVG image ?
How about transforms applied on the bitmap images (perspective, mappings, etc.) ?
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Can you help me understand Moq Callback?
... that's not clear enough, I'd call that a doc bug...
EDIT: In response to your clarification...
For each mocked method Setup you perform, you get to indicate things like:
constraints on inputs
the value for / way in which the return value (if there is one) is to be derived
The .Callback mechan...