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<oerjan> fetch ../bin/rlexp https://hack.esolangs.org/get/bin/rlexp
author HackEso <hackeso@esolangs.org>
date Wed, 20 Nov 2019 06:20:25 +0000
parents 575e46a47bd9
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isJust is just a Haskell function to check if a value is Just a.