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Description
I have found myself wanting to write something like:
X = [f(a) for a in iterator if cond1(a) while cond2(a)]
and have this return elements from the iterator until cond2(a) returns false. This would essentially be the same as:
X = []
for a in iterator
!cond2(a) && break
cond1(a) && push!(X, f(a))
end
Using while in this context looks and feels a lot like the functional takewhile function, uses an already existing keyword, and is to my eyes a lot less noisy than the explicit loop above.
There are a few StackOverflow questions that have asked for a similar functionality here https://stackoverflow.com/questions/44097910/killing-a-for-loop-in-julia-array-comprehension and here https://stackoverflow.com/questions/44101965/array-comprehension-with-a-random-output-in-julia/