RosettaCodeData/Task/Temperature-conversion/AppleScript/temperature-conversion.appl...

117 lines
2.6 KiB
AppleScript

use framework "Foundation" -- Yosemite onwards, for the toLowerCase() function
-- Kelvin to other scale
-- kelvinAs :: ScaleName -> Num -> Num
on kelvinAs(strOtherScale, n)
heatBabel(n, "Kelvin", strOtherScale)
end kelvinAs
-- More general conversion
-- heatBabel :: n -> ScaleName -> ScaleName -> Num
on heatBabel(n, strFromScale, strToScale)
set ratio to 9 / 5
set cels to 273.15
set fahr to 459.67
script reading
on lambda(x, strFrom)
if strFrom = "k" then
x as real
else if strFrom = "c" then
x + cels
else if strFrom = "f" then
(fahr + x) * ratio
else
x / ratio
end if
end lambda
end script
script writing
on lambda(x, strTo)
if strTo = "k" then
x
else if strTo = "c" then
x - cels
else if strTo = "f" then
(x * ratio) - fahr
else
x * ratio
end if
end lambda
end script
writing's lambda(reading's lambda(n, ¬
toLowerCase(text 1 of strFromScale)), ¬
toLowerCase(text 1 of strToScale))
end heatBabel
-- TEST
on kelvinTranslations(n)
script translations
on lambda(x)
{x, kelvinAs(x, n)}
end lambda
end script
map(translations, {"K", "C", "F", "R"})
end kelvinTranslations
on run
script tabbed
on lambda(x)
intercalate(tab, x)
end lambda
end script
intercalate(linefeed, map(tabbed, kelvinTranslations(21)))
end run
-- GENERIC LIBRARY FUNCTIONS
-- toLowerCase :: String -> String
on toLowerCase(str)
set ca to current application
((ca's NSString's stringWithString:(str))'s ¬
lowercaseStringWithLocale:(ca's NSLocale's currentLocale())) as text
end toLowerCase
-- intercalate :: Text -> [Text] -> Text
on intercalate(strText, lstText)
set {dlm, my text item delimiters} to {my text item delimiters, strText}
set strJoined to lstText as text
set my text item delimiters to dlm
return strJoined
end intercalate
-- 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 lambda(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 lambda : f
end script
end if
end mReturn