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    The Calendar hole will go live in approximately . Why not try and solve it ahead of time?

    ejini6969

    21,987
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    21,174
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    27 / 123 Holes

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    8 / 62 Langs

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    16 / 98 Cheevos

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    1 Referral

    Card Number Validation in Ruby in Chars Play Hole

    23rd in Ruby and 697th overall.

    Last tested .

    Runtime of .

    Bytes Chars Submitted
    102 102
    106 106
    107 107