109 lines
2.2 KiB
AppleScript
109 lines
2.2 KiB
AppleScript
--------------------- IDENTITY MATRIX ----------------------
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-- identityMatrix :: Int -> [(0|1)]
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on identityMatrix(n)
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set xs to enumFromTo(1, n)
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script row
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on |λ|(x)
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script col
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on |λ|(i)
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if i = x then
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1
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else
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0
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end if
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end |λ|
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end script
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map(col, xs)
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end |λ|
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end script
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map(row, xs)
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end identityMatrix
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--------------------------- TEST ---------------------------
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on run
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unlines(map(showList, ¬
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identityMatrix(5)))
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end run
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-------------------- GENERIC FUNCTIONS ---------------------
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-- enumFromTo :: Int -> Int -> [Int]
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on enumFromTo(m, n)
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if m ≤ n then
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set lst to {}
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repeat with i from m to n
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set end of lst to i
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end repeat
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lst
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else
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{}
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end if
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end enumFromTo
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-- intercalate :: String -> [String] -> String
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on intercalate(delim, xs)
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set {dlm, my text item delimiters} to ¬
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{my text item delimiters, delim}
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set s to xs as text
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set my text item delimiters to dlm
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s
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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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-- showList :: [a] -> String
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on showList(xs)
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"[" & intercalate(", ", map(my str, xs)) & "]"
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end showList
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-- str :: a -> String
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on str(x)
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x as string
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end str
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-- unlines :: [String] -> String
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on unlines(xs)
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-- A single string formed by the intercalation
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-- of a list of strings with the newline character.
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set {dlm, my text item delimiters} to ¬
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{my text item delimiters, linefeed}
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set s to xs as text
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set my text item delimiters to dlm
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s
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end unlines
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