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Should you always favor xrange() over range()?
...till a few cases why you might prefer range():
In python 3, range() does what xrange() used to do and xrange() does not exist. If you want to write code that will run on both Python 2 and Python 3, you can't use xrange().
range() can actually be faster in some cases - eg. if iterating over the sa...
List of lists changes reflected across sublists unexpectedly
...evaluation of [1] * 4 generates a new list, so the list comprehension does what you wanted.
Incidentally, [1] * 4 also doesn't copy the elements of [1], but that doesn't matter, since integers are immutable. You can't do something like 1.value = 2 and turn a 1 into a 2.
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Use PHP composer to clone git repo
...thub that isn't in packagist but it's not working and I can't figure out what am I doing wrong.
8 Answers
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do you have kcachegrind like profiling tools for mac [closed]
...r, to enable graphviz support:
brew install qcachegrind --with-graphviz
What's great about this program is that I successfully loaded a 6.1GB cachegrind file on my MacBook Pro! Pretty slick!
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How do you create a read-only user in PostgreSQL?
...unately, this is all quite a bit more complicated than this. :-/ I'll post what I ended up doing once I've validated it some more.
– JJC
Dec 23 '14 at 4:03
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Why does MYSQL higher LIMIT offset slow the query down?
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@harald: what exactly do you mean by "not work"? This is a pure performance improvement. If there is no index usable by ORDER BY or the index covers all fields you need, you don't need this workaround.
– Quassnoi...
Truncate (not round) decimal places in SQL Server
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The answer should explain what the parameters of the function are
– Tyler
Sep 25 '18 at 15:59
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How do you return a JSON object from a Java Servlet
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I do exactly what you suggest (return a String).
You might consider setting the MIME type to indicate you're returning JSON, though (according to this other stackoverflow post it's "application/json").
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Why use apparently meaningless do-while and if-else statements in macros?
In many C/C++ macros I'm seeing the code of the macro wrapped in what seems like a meaningless do while loop. Here are examples.
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How do I delete a Git branch locally and remotely?
...d with a feature and have merged it into your remote’s master branch (or whatever branch your stable code-line is in). You can delete a remote branch using the rather obtuse syntax git push [remotename] :[branch]. If you want to delete your server-fix branch from the server, you run the following:...