Palindrome dates: Difference between revisions
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=={{header|AppleScript}}== |
=={{header|AppleScript}}== |
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===Procedural=== |
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<lang applescript>on palindromeDates(startYear, targetNumber) |
<lang applescript>on palindromeDates(startYear, targetNumber) |
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script o |
script o |
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<pre>{"2021-12-02", "2030-03-02", "2040-04-02", "2050-05-02", "2060-06-02", "2070-07-02", "2080-08-02", "2090-09-02", "2101-10-12", "2110-01-12", "2111-11-12", "2120-02-12", "2121-12-12", "2130-03-12", "2140-04-12"}</pre> |
<pre>{"2021-12-02", "2030-03-02", "2040-04-02", "2050-05-02", "2060-06-02", "2070-07-02", "2080-08-02", "2090-09-02", "2101-10-12", "2110-01-12", "2111-11-12", "2120-02-12", "2121-12-12", "2130-03-12", "2140-04-12"}</pre> |
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===Functional=== |
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Or, for a functional composition (rather than a procedure), we can return a count and two samples of all palindromic dates for years in the range [2021 .. 9999], by assembling a function from reusable generics: |
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<lang applescript>use AppleScript version "2.4" |
<lang applescript>use AppleScript version "2.4" |
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-- palinYearsInRange :: Int -> Int -> [String] |
-- palinYearsInRange :: Int -> Int -> [String] |
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on palinYearsInRange(fromYear, toYear) |
on palinYearsInRange(fromYear, toYear) |
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concatMap(palinDay(iso8601Formatter()), ¬ |
concatMap(palinDay(iso8601Formatter()), ¬ |
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enumFromTo(fromYear, toYear)) |
enumFromTo(fromYear, toYear)) |
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end palinYearsInRange |
end palinYearsInRange |
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set {m, m1, d, d1} to reverse of characters of s |
set {m, m1, d, d1} to reverse of characters of s |
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set mbDate to s & "-" & m & m1 & "-" & d & d1 |
set mbDate to s & "-" & m & m1 & "-" & d & d1 |
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if missing value is not ¬ |
if missing value is not ¬ |
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(fmtr's dateFromString:(mbDate & ¬ |
(fmtr's dateFromString:(mbDate & ¬ |
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---------------------------TEST |
--------------------------- TEST --------------------------- |
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on run |
on run |
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set xs to palinYearsInRange(2021, 9999) |
set xs to palinYearsInRange(2021, 9999) |
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-------------------- |
-------------------- GENERIC FUNCTIONS --------------------- |
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-- concatMap :: (a -> [b]) -> [a] -> [b] |
-- concatMap :: (a -> [b]) -> [a] -> [b] |
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end if |
end if |
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end mReturn |
end mReturn |
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-- iso8601Formatter :: () -> NSISO8601DateFormatter |
-- iso8601Formatter :: () -> NSISO8601DateFormatter |
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end tell |
end tell |
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end iso8601Formatter |
end iso8601Formatter |
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-- unlines :: [String] -> String |
-- unlines :: [String] -> String |
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