• mrgoosmoos@lemmy.caEnglish
    11·
    1 day ago

    look I’m not trying to be a dick or anything, but do you not know about leap years and which years they are?

    • comfy@lemmy.ml
      1·
      2 hours ago

      edit: just realized it was the python and not ruby example, I was very tired and distracted when I was reading this thread.

      • Kazumara@discuss.tchncs.de
        5·
        8 hours ago

        Leap years are each fourth year, except each hundredth year, except each thousandth fourhundredth year.

        1896 leap year
        1900 not leap year
        1904 leap year
        …
        1996 leap year
        2000 leap year
        2004 leap year
        …
        2096 leap year
        2100 not leap year
        2104 leap year

        Then you just arrange the 10 year window in different positions to overlap 1 to 3 leap years to reveal the three outcomes of the bug.

        - / - - - / - - - /
        - - / - - - / - - -
        - - 0 - - - / - - -

        - is a normal year, / is a leap year, 0 is an exceptional non-leap year.

        • sexybenfranklin@ttrpg.networkEnglish
          2·
          15 hours ago

          Small correction, it’s every fourth year except every hundreth year except every 400th year. I’m assuming the misconception comes from the last time it was a 100th also being a 1000th (2000) but the next time a leap year will end in 00 is 2400