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The difference between bracket [ ] and double bracket [[ ]] for accessing the elements of a list or
...different methods for accessing the elements of a list or data.frame: [] and [[]] .
12 Answers
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django - query filter on manytomany is empty
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And the inverse is possible with TestModel.objects.exclude(manytomany=None)
– Alex L
Oct 2 '13 at 9:30
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Calling static generic methods
...nt of type Class<E> (so it would be createFoo(Class<E> type)), and call it with createFoo(String.class)
– Gavin S. Yancey
Apr 16 '15 at 2:24
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What is the Git equivalent for revision number?
...r my personal projects I decided to use Git. So I installed Git yesterday, and I wonder what is the revision number equivalent in Git .
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How to make an ng-click event conditional?
...so you can't use it with <a>, but you can use it with <button> and style it as link.
Another way is to use lazy evaluation of expressions like isDisabled || action() so action wouold not be called if isDisabled is true.
Here goes both solutions: http://plnkr.co/edit/5d5R5KfD4PCE8vS3OSS...
Staging Deleted files
...l
matching files. Also a leading directory name (e.g. dir to add dir/file1 and dir/file2) can be given to update the index to match the current state of the directory as a whole (e.g. specifying dir will record not just a file dir/file1 modified in the working tree, a file dir/file2 added to the wor...
How to append text to a text file in C++?
How to append text to a text file in C++? And create a new text file if it does not already exist and append text to it if it does exist.
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What is the purpose of “&&” in a shell command?
As far as I know, using & after the command is for running it in the background.
9 Answers
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Rails how to run rake task
... answered Apr 12 '11 at 21:24
Andrew MarshallAndrew Marshall
87.3k1818 gold badges202202 silver badges204204 bronze badges
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Convert numpy array to tuple
...turn tuple(totuple(i) for i in a)
except TypeError:
return a
And an example:
>>> array = numpy.array(((2,2),(2,-2)))
>>> totuple(array)
((2, 2), (2, -2))
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