How do you do simply select a subset of an array based on a condition? I know Julia doesn't use vectorization, but there must be a simple way of doing the following without an ugly looking multi-line for
loop
julia> map([1,2,3,4]) do x
return (x%2==0)?x:nothing
end
4-element Array{Any,1}:
nothing
2
nothing
4
Desired output:
[2, 4]
Observed output:
[nothing, 2, nothing, 4]
You are looking for filter
. Here is an example an filter(x->x%2==0,[1,2,3,5])
returning [2]
.