RosettaCodeData/Task/Multiple-distinct-objects/AppleScript/multiple-distinct-objects-1...

61 lines
1.4 KiB
AppleScript

-- MULTIPLE DISTINCT OBJECTS -------------------------------------------------
-- nObjects Constructor -> Int -> [Object]
on nObjects(f, n)
map(f, enumFromTo(1, n))
end nObjects
-- TEST ----------------------------------------------------------------------
on run
-- someConstructor :: a -> Int -> b
script someConstructor
on |λ|(_, i)
{index:i}
end |λ|
end script
nObjects(someConstructor, 6)
--> {{index:1}, {index:2}, {index:3}, {index:4}, {index:5}, {index:6}}
end run
-- GENERIC FUNCTIONS ---------------------------------------------------------
-- enumFromTo :: Int -> Int -> [Int]
on enumFromTo(m, n)
if m > n then
set d to -1
else
set d to 1
end if
set lst to {}
repeat with i from m to n by d
set end of lst to i
end repeat
return lst
end enumFromTo
-- map :: (a -> b) -> [a] -> [b]
on map(f, xs)
tell mReturn(f)
set lng to length of xs
set lst to {}
repeat with i from 1 to lng
set end of lst to |λ|(item i of xs, i, xs)
end repeat
return lst
end tell
end map
-- Lift 2nd class handler function into 1st class script wrapper
-- mReturn :: Handler -> Script
on mReturn(f)
if class of f is script then
f
else
script
property |λ| : f
end script
end if
end mReturn