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Why is '+' not understood by Python sets?
...or symmetric set difference (i.e., it will return a new set with only the objects that appear in one set but do not appear in both sets).
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Best implementation for hashCode method for a collection
How do we decide on the best implementation of hashCode() method for a collection (assuming that equals method has been overridden correctly) ?
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Suppress warning CS1998: This async method lacks 'await'
...terface does not have anything to await, and some might just throw. It's a bit annoying with all the warnings.
14 Answers
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Understanding Node.js modules: multiple requires return the same object?
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If both app.js and b.js reside in the same project (and in the same directory) then both of them will receive the same instance of A. From the node.js documentation:
... every call to require('foo') will get exactly the same...
Convert string to binary in python
I am in need of a way to get the binary representation of a string in python. e.g.
8 Answers
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What is “vectorization”?
Several times now, I've encountered this term in matlab, fortran ... some other ... but I've never found an explanation what does it mean, and what it does? So I'm asking here, what is vectorization, and what does it mean for example, that "a loop is vectorized" ?
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Squash the first two commits in Git? [duplicate]
With git rebase --interactive <commit> you can squash any number of commits together into a single one.
9 Answers
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How to calculate the difference between two dates using PHP?
...for legacy code (PHP < 5.3). For up to date solution see jurka's answer below
You can use strtotime() to convert two dates to unix time and then calculate the number of seconds between them. From this it's rather easy to calculate different time periods.
$date1 = "2007-03-24";
$date2 = "2009-0...
How to programmatically set style attribute in a view
I'm getting a view from the XML with the code below:
11 Answers
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xcopy file, rename, suppress “Does xxx specify a file name…” message
This seems pretty simple and maybe I'm just overlooking the proper flag , but how would I, in one command, copy a file from one directory to another and rename it in the destination directory? Here's my command:
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