27 lines
508 B
Plaintext
27 lines
508 B
Plaintext
import("std/op").
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takeWhileS(f, "") -> "".
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takeWhileS(f, x::xs) -> do
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if f(x) == true then x :: takeWhileS(f, xs)
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else ""
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end.
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takeUntilS(f, xs) -> takeWhileS(\x -> op\not(f(x)), xs).
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dropWhileS(f, "") -> "".
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dropWhileS(f, x::xs) -> do
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if f(x) == true then dropWhileS(f, xs)
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else x :: xs
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end.
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dropS(0, x) -> x.
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dropS(n, "") -> "".
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dropS(n, _::xs) -> dropS(n-1, xs).
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takeS(0, _) -> "".
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takeS(n, "") -> "".
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takeS(n, x::xs) -> x :: takeS(n-1, xs).
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concat([]) -> "".
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concat(x :: xs) -> x + concat(xs).
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