15 lines
190 B
Plaintext
15 lines
190 B
Plaintext
pub fn length(xs: List<a>) -> Int {
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when xs is {
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[] -> 0
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[_, ..rest] -> 1 + length(rest)
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}
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}
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test length_1() {
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length([1, 2, 3]) == 3
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}
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test length_2() {
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length([]) == 0
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}
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