Day of the week: Difference between revisions
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(→{{header|Python}}: Added a datetime variant) |
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The function <code>calendar.weekday</code> accepts all dates between 1/1/1 and 9999/12/31, and uses the [https://en.wikipedia.org/wiki/Proleptic_Gregorian_calendar proleptic Gregorian calendar] before adoption of the [https://en.wikipedia.org/wiki/Gregorian_calendar Gregorian calendar] in 1582. There is no gap between 1582/10/4 and 1582/10/15, as can be seen with <code>print(calendar.calendar(1582))</code>. |
The function <code>calendar.weekday</code> accepts all dates between 1/1/1 and 9999/12/31, and uses the [https://en.wikipedia.org/wiki/Proleptic_Gregorian_calendar proleptic Gregorian calendar] before adoption of the [https://en.wikipedia.org/wiki/Gregorian_calendar Gregorian calendar] in 1582. There is no gap between 1582/10/4 and 1582/10/15, as can be seen with <code>print(calendar.calendar(1582))</code>. |
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Or, in terms of datetime: |
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<lang python>import datetime |
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# xmasIsSunday :: Int -> Bool |
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def xmasIsSunday(y): |
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return 6 == datetime.date(y, 12, 25).weekday() |
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# main :: IO () |
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def main(): |
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print( |
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[y for y in enumFromTo(2008)(2121) if xmasIsSunday(y)] |
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) |
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# GENERIC ------------------------------------------------- |
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# enumFromTo :: Int -> Int -> [Int] |
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def enumFromTo(m): |
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return lambda n: list(range(m, 1 + n)) |
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# MAIN -- |
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main()</lang> |
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{{Out}} |
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<pre>[2011, 2016, 2022, 2033, 2039, 2044, 2050, 2061, 2067, 2072, 2078, 2089, 2095, 2101, 2107, 2112, 2118]</pre> |
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=={{header|R}}== |
=={{header|R}}== |
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