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When should we use intern method of String on String literals
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New to Java (I am from the C#.NET world) and I sometimes see in a Java legacy project "".intern() so if I understand it correctly that this is "nonsense" also for empty strings.
– hfrmobile
Apr 11 '13 at 11:46
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What is the difference between dict.items() and dict.iteritems() in Python2?
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@RubenGeert Most of the time, it doesn't matter. For really large dicts it might be preferable.
– Keith
Nov 12 '18 at 3:44
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Combine two columns of text in pandas dataframe
... without CPU/GPU optimization (sorted from fastest to slowest):
In [107]: %timeit df['Year'].astype(str) + df['quarter']
10 loops, best of 3: 131 ms per loop
In [106]: %timeit df['Year'].map(str) + df['quarter']
10 loops, best of 3: 161 ms per loop
In [108]: %timeit df.Year.str.cat(df.quarter)
10 ...
How to find all occurrences of an element in a list?
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This was a long time ago, I probably used timeit.timeit with randomly generated lists. That's an important point though, and I suppose that may be why you ask. At the time it didn't occur to me, but the speed gains are only true if the resul...
Find intersection of two nested lists?
... The average case of "val in s2" is O(1) according to wiki.python.org/moin/TimeComplexity#set - thus over n operations the expected time is O(n) (whether the worst-case time is O(n) or O(n^2) depends on whether this average case represents an amortized time or not, but this isn't very important in p...
Timeout a command in bash without unnecessary delay
... to Command line command to auto-kill a command after a certain amount of time
23 Answers
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AutoMapper: “Ignore the rest”?
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I haven't used AutoMapper for some time, but I'll accept your answer if it works for you :).
– Igor Brejc
Jun 9 '11 at 4:07
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SQL update trigger only when column is modified
...; I.QtyToRepair
END
END
Please note that this trigger will fire each time you update the column no matter if the value is the same or not.
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Git on Bitbucket: Always asked for password, even after uploading my public SSH key
...f you clone with SSH url, you don't need to enter username / password each time you push / pull. Check above answer by @manojlds
But if you want to clone with HTTPS and want to avoid entering username / password each time, you can store credentials into cache with below command:
git config --globa...
git ignore vim temporary files
...l edit files named, for example, config.xml in two directories at the same time.
– Brian
Jan 19 '17 at 15:00
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