Note its possible to write the example more succinctly (while having the same behavior) with: https://docs.rs/itertools/latest/itertools/trait.Itertools.html#m

Note its possible to write the example more succinctly (while having the same behavior) with: https://docs.rs/itertools/latest/itertools/trait.Itertools.html#method.exactly_one https://docs.rs/itertools/latest/itertools/trait.Itertools.h...