##Leap My code: here
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Responder #1 (here) - This responder took largely the same approach as me but used the "if/return true" approach rather than the single line return method. In this case I feel the one-line method is sufficiently clear and therefore would probably be preferred over using if/return.
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Responder #2 (here) - This user employed an even more broken-out approach than the first responder, creating a three part "if - else if - else" conditional. For the same reason as #1 I feel that the one-line approach would be preferred in this case.
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Responder #3 (here) - This user decided to build the logic out with a nested conditional, nesting the %100 and %400 checks within the %4 conditional. It appears cleaner at first glance and the ne