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Is there a standard sign function (signum, sgn) in C/C++?
I want a function that returns -1 for negative numbers and +1 for positive numbers.
http://en.wikipedia.org/wiki/Sign_function
It's easy enough to write my own, but it seems like something that ought to be in a standard library somewhere.
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How do you reindex an array in PHP?
...hich I would like to reindex so the keys are reversed (ideally starting at 1):
21 Answers
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Return multiple values in JavaScript?
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1380
No, but you could return an array containing your values:
function getValues() {
return ...
SQLite - UPSERT *not* INSERT or REPLACE
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Android dex gives a BufferOverflowException when building
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Right way to reverse pandas.DataFrame?
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data.reindex(index=data.index[::-1])
or simply:
data.iloc[::-1]
will reverse your data frame, if you want to have a for loop which goes from down to up you may do:
for idx in reversed(data.index):
print(idx, data.loc[idx, 'Even'], data.loc[idx, 'Od...
Java: how can I split an ArrayList in multiple small ArrayLists?
How can I split an ArrayList (size=1000) in multiple ArrayLists of the same size (=10) ?
18 Answers
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Install go with brew, and running the gotour
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185
Installing go 1.4 with homebrew on OSX:
1) Create Directories
mkdir $HOME/Go
mkdir -p $HOME/...
Converting a list to a set changes element order
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