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RosettaCodeData/Task/Long-year/APL/long-year.apl
Ingy döt Net f23f22d71c Initial data commit
2023-07-01 13:44:08 -04:00

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dec31weekday ← {7|⍵+⌊(⍵÷4)+⌊(⍵÷400)-⌊⍵÷100}
isolongyear ← {(4 = dec31weekday ⍵) ∨ 3 = dec31weekday ⍵ - 1}
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