92 lines
2.0 KiB
AppleScript
92 lines
2.0 KiB
AppleScript
-- ZIP LISTS WITH FUNCTION ---------------------------------------------------
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-- zipListsWith :: ([a] -> b) -> [[a]] -> [[b]]
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on zipListsWith(f, xss)
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set n to length of xss
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script
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on |λ|(_, i)
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script
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on |λ|(xs)
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item i of xs
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end |λ|
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end script
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if i ≤ n then
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apply(f, (map(result, xss)))
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else
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{}
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end if
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end |λ|
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end script
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if n > 0 then
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map(result, item 1 of xss)
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else
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[]
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end if
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end zipListsWith
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-- TEST ( zip lists with concat ) -------------------------------------------
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on run
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intercalate(linefeed, ¬
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zipListsWith(concat, ¬
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[["a", "b", "c"], ["A", "B", "C"], [1, 2, 3]]))
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end run
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-- GENERIC FUNCTIONS ---------------------------------------------------------
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-- apply (a -> b) -> a -> b
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on apply(f, a)
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mReturn(f)'s |λ|(a)
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end apply
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-- concat :: [[a]] -> [a] | [String] -> String
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on concat(xs)
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if length of xs > 0 and class of (item 1 of xs) is string then
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set acc to ""
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else
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set acc to {}
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end if
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repeat with i from 1 to length of xs
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set acc to acc & item i of xs
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end repeat
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acc
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end concat
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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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-- 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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-- 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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