Everyone,
I just recently needed to find the index of the n-th occurrence of a
predicate an Array and was a bit surprised that there was not a
convenience function in Base. Rolling one on your own is simple, but
I somehow expected to find something in Base to get the same
functionality.
function findocc(testf::Function, A, n)
i = 0
for _ in 1:n
i = findnext(testf, A, i + 1)
i != 0 || return 0
end
return i
end
Am I perhaps missing something that is already supported in Base? [1]
If not, I may consider yet another small pull request. But as always
with these small convenience functions I fear that I am missing
something obvious that already supports the same functionality.
Pontus
[1]:
http://julia.readthedocs.org/en/latest/stdlib/arrays/?highlight=find#Base.find
