Standing on the shoulders of Subtle Patterns. Built and maintained by mikehearn.
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The negation of a disjunction is the conjunction of the negations and The negation of a conjunction is the disjunction of the negations.
Labelary is an online ZPL (Zebra Programming Language) editor and viewer
Dillinger is an online markdown editor
Rubular is an online tool to check regular expressions written in Ruby.