Sha256: f80f7c745037be7bfc21b4f7187223dca0616f733f9efdcb844724682b6d03bf
Contents?: true
Size: 1.54 KB
Versions: 200
Compression:
Stored size: 1.54 KB
Contents
import Base: AbstractSet, isempty, length, in, issubset, start, next, done,
push!, ==, copy, intersect!, intersect, union!, union
struct CustomSet{T} <: AbstractSet{T}
elements::Array{T, 1}
end
isempty(s::CustomSet) = isempty(s.elements)
length(s::CustomSet) = length(s.elements)
in(element, s::CustomSet) = in(element, s.elements) # this also defines issubset(::CustomSet, ::CustomSet)
==(s1::CustomSet, s2::CustomSet) = issubset(s1, s2) && issubset(s2, s1)
copy(s::CustomSet) = CustomSet(copy(s.elements))
push!(s::CustomSet, element) = push!(s.elements, element)
# Iterator protocol
start(::CustomSet) = 1
next(s::CustomSet, state) = s.elements[state], state + 1
done(s::CustomSet, state) = state > length(s)
function disjoint(s1::CustomSet, s2::CustomSet)
for element in s1
element in s2 && return false
end
return true
end
function complement!(s1::CustomSet, s2::CustomSet)
for (i, element) in enumerate(s1)
element in s2 && deleteat!(s1.elements, i)
end
return s1
end
complement(s1::CustomSet, s2::CustomSet) = complement!(copy(s1), s2)
function intersect!(s1::CustomSet, s2::CustomSet)
tbd = Int[]
for (i, element) in enumerate(s1)
element in s2 || push!(tbd, i)
end
deleteat!(s1.elements, tbd)
return s1
end
intersect(s1::CustomSet, s2::CustomSet) = intersect!(copy(s1), s2)
function union!(s1::CustomSet, s2::CustomSet)
for element in s2
element in s1 || push!(s1, element)
end
return s1
end
union(s1::CustomSet, s2::CustomSet) = union!(copy(s1), s2)
Version data entries
200 entries across 200 versions & 1 rubygems