62 lines
1.5 KiB
AppleScript
62 lines
1.5 KiB
AppleScript
-- ROT 13 --------------------------------------------------------------------
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-- rot13 :: String -> String
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on rot13(str)
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script rt13
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on |λ|(x)
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if (x ≥ "a" and x ≤ "m") or (x ≥ "A" and x ≤ "M") then
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character id ((id of x) + 13)
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else if (x ≥ "n" and x ≤ "z") or (x ≥ "N" and x ≤ "Z") then
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character id ((id of x) - 13)
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else
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x
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end if
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end |λ|
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end script
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intercalate("", map(rt13, characters of str))
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end rot13
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-- TEST ----------------------------------------------------------------------
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on run
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rot13("nowhere ABJURER")
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--> "abjurer NOWHERE"
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end run
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-- GENERIC FUNCTIONS ---------------------------------------------------------
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-- map :: (a -> b) -> [a] -> [b]
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on map(f, xs)
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tell mReturn(f)
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set lng to length of xs
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set lst to {}
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repeat with i from 1 to lng
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set end of lst to |λ|(item i of xs, i, xs)
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end repeat
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return lst
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end tell
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end map
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-- intercalate :: Text -> [Text] -> Text
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on intercalate(strText, lstText)
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set {dlm, my text item delimiters} to {my text item delimiters, strText}
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set strJoined to lstText as text
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set my text item delimiters to dlm
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return strJoined
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end intercalate
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-- Lift 2nd class handler function into 1st class script wrapper
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-- mReturn :: Handler -> Script
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on mReturn(f)
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if class of f is script then
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f
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else
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script
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property |λ| : f
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end script
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end if
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end mReturn
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