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pub fn unzip(xs: List<#(a, b)>) -> #(List<a>, List<b>) {
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when xs is {
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[] -> #([], [])
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[#(a, b), ..rest] -> {
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let #(a_tail, b_tail) = unzip(rest)
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#([a, ..a_tail], [b, ..b_tail])
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}
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}
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}
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test unzip_1() {
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unzip([#(1, "a"), #(2, "b")]) == #([1, 2], ["a", "b"])
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}
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