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Filter by property
... bad luck that this feature is not implemented, would be an interesting extension to at least filter out matching objects after the resultset has been build.
– schneck
Jul 30 '09 at 9:24
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nil detection in Go
... I think this is wrong, as it is always false: play.golang.org/p/g-MdbEbnyNx
– Madeo
Oct 16 '19 at 0:29
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Is there an R function for finding the index of an element in a vector?
In R, I have an element x and a vector v . I want to find the first index of an element in v that is equal to x . I know that one way to do this is: which(x == v)[[1]] , but that seems excessively inefficient. Is there a more direct way to do it?
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How can I check if a file exists in Perl?
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Test whether something exists at given path using the -e file-test operator.
print "$base_path exists!\n" if -e $base_path;
However, this test is probably broader than you intend. The code above will generate output if a plain file exists at that...
How to make execution pause, sleep, wait for X seconds in R?
...ction, but ?sleep references a data set. And ?pause and ?wait don't exist.
2 Answers
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Why does integer division in C# return an integer and not a float?
...ing point number you would be forced to round the result every time. One example off of the top of my head is changing the base of a number. Calculating each digit involves the integer division of a number along with the remainder, rather than the floating point division of the number.
Because of...
Draw multi-line text to Canvas
A hopefully quick question, but I can't seem to find any examples... I'd like to write multi-line text to a custom View via a Canvas , and in onDraw() I have:
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SVG: text inside rect
I want to display some text inside SVG rect . Is it possible?
5 Answers
5
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How can I check for NaN values?
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math.isnan(x)
Return True if x is a NaN (not a number), and False otherwise.
>>> import math
>>> x = float('nan')
>>> math.isnan(x)
True
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How do I prevent 'git diff' from using a pager?
...IT_PAGER=cat git diff
# Tells 'less' not to paginate if less than a page
export LESS="-F -X $LESS"
# ...then Git as usual
git diff
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