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Get average color of image via Javascript
...ur browser if you try it in the client. I have been working on refactoring my execution to:
- store results in a lookup table for future use in the iteration over each pixel.
- to divide large images into grids of 20px 20px for localized dominance.
- to use the euclidean distance between x1y1 ...
Why is there no tuple comprehension in Python?
...ch of a win vs just using tuple(obj[item] for item in items) directly. In my case I was embedding this into a list comprehension to make a list of tuple records. If I need to do this repeatedly throughout the code then itemgetter looks great. Perhaps itemgetter would be more idiomatic either way?...
How can I drop all the tables in a PostgreSQL database?
...g2.ProgrammingError'> no schema has been selected to create in
So to my mind the fully correct answer is:
DROP SCHEMA public CASCADE;
CREATE SCHEMA public;
GRANT ALL ON SCHEMA public TO postgres;
GRANT ALL ON SCHEMA public TO public;
COMMENT ON SCHEMA public IS 'standard public schema';
Als...
Check number of arguments passed to a Bash script
I would like my Bash script to print an error message if the required argument count is not met.
10 Answers
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Difference between map, applymap and apply methods in Pandas
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It's on page 129 in my copy for some reason. There's no label for second edition or anything.
– Jody
Jan 26 '16 at 21:34
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In a Django form, how do I make a field readonly (or disabled) so that it cannot be edited?
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Correct answer. My solution class MyChangeForm(forms.ModelForm): def __init__(self, *args, **kwargs): super(MyChangeForm, self).__init__(*args, **kwargs) self.fields['my_field'].disabled = True
–...
Why are empty catch blocks a bad idea? [closed]
...nd is not abused as control flow (although this is a more specific case of my first point).
– Boris B.
Sep 12 '13 at 8:34
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show 7 more comm...
How do you fix a bad merge, and replay your good commits onto a fixed merge?
...ly committed an unwanted file ( filename.orig while resolving a merge) to my repository several commits ago, without me noticing it until now. I want to completely delete the file from the repository history.
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JavaScript: How to find out if the user browser is Chrome?
... the new Opera 30. So you must check if OPR is in the userAgent. I updated my condition above to account for this new change in Opera 30, since it uses same render engine as Google Chrome.
UPDATE 10/13/2015 - addition for IE check
Added check for IE Edge due to it outputting true for window.chrome...
Initialize a byte array to a certain value, other than the default null? [duplicate]
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Indeed. My main concern here is more compact code; if I have to do this method for each of the files that the program has to generate and process and keep things as they are, I'm going to have to copy and paste a ton of loops. I'm su...