setdiff
setdiff(s1,s2)
Construct the set of elements in s1 but not s2. Maintains order with arrays. Note that both arguments must be collections, and both will be iterated over. In particular, setdiff(set,element) where element is a potential member of set, will not work in general.
Examples
julia> setdiff(Set(1,2,3,4),Set(2,3,5))
Set{Int64}({4,1})julia> setdiff(Set(2,3),Set(2,3))
Set{Int64}({})julia> all = [10:-1:1];
julia> odd = [1:2:10];
julia> even = setdiff(all, odd) # note the ordering of elements in result
5-element Array{Int64,1}:
10
8
6
4
2See Also
complement, complement!, intersect, intersect!, issubset, selectperm, selectperm!, Set, setdiff, setdiff!, symdiff, union, union!,User Contributed Notes
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