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How to upgrade all Python packages with pip?
Is it possible to upgrade all Python packages at one time with pip ?
55 Answers
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How to test if one java class extends another at runtime?
...wered Aug 17 '10 at 16:50
Tim StoneTim Stone
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How do you get the logical xor of two variables in Python?
... Although this is clever and short, I'm not convinced it's clean. When someone reads this construct in the code, is it immediately obvious to them that this is an xor operation? I felt obliged to add a comment - a sign for me that I'm writing unclear code and try to apologise with a comment.
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Equivalent of String.format in jQuery
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License or no license.. there's only one right way to write something so simple
– adamJLev
Oct 1 '10 at 18:01
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Find nearest value in numpy array
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Actually, that still only works for one dimension, since argmin() gives multiple results per column / dimension. Also I had a typo. This works, at least for 2 dimensions: a[np.sum(np.square(np.abs(a-a0)),1).argmin()].
– Max Shron
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How do I merge two dictionaries in a single expression in Python (taking union of dictionaries)?
...es
z.update(y) # modifies z with y's keys and values & returns None
return z
and now:
z = merge_two_dicts(x, y)
In Python 3.9.0a4 or greater (final release date approx October 2020): PEP-584, discussed here, was implemented to further simplify this:
z = x | y # NOTE: 3.9+ ...
#pragma pack effect
I was wondering if someone could explain to me what the #pragma pack preprocessor statement does, and more importantly, why one would want to use it.
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How do you switch pages in Xamarin.Forms?
... built-in:
NavigationPage, where the next page slide in,
TabbedPage, the one you don't like
CarouselPage, that allows for switching left and right to next/prev pages.
On top of this, all pages also supports PushModalAsync() which just push a new page on top of the existing one.
At the very end,...
When do you use the Bridge Pattern? How is it different from Adapter pattern?
Has anyone ever used the Bridge Pattern in a real world application? If so, how did you use it? Is it me, or is it just the Adaptor Pattern with a little dependency injection thrown into the mix? Does it really deserve its own pattern?
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What is sharding and why is it important?
...ta records are logically split up in a sharded database. Unlike the partitioned database, each complete data record exists in only one shard (unless there's mirroring for backup/redundancy) with all CRUD operations performed just in that database. You may not like the terminology used, but this does...