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dennisvennink/product.swift

Created August 13, 2017 08:56
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product.swift
let s1 = [1, 2]
let s2 = [3, 4, 5]
func product <Sequence1: Sequence, Sequence2: Sequence> (_ s1: Sequence1, _ s2: Sequence2) -> AnySequence<(Sequence1.Element, Sequence2.Element)> {
return AnySequence(
s1.flatMap { e1 in
s2.map { e2 in
print(e1, e2)
return (e1, e2)
}
}
)
}
for (e1, e2) in product(s1, s2) {
if e1 == 1 && e2 == 3 {
break
}
}
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