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robertsosinski/gist:6b4f16730bbd932bf153f68b9e477d56

Created January 9, 2022 19:27
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gistfile1.txt
-- 1. must be between 3 and 20 characters,
-- 2. must be only:
-- a. lowercase letters,
-- b. numbers,
-- c. individual dashes.
-- 3. must start with a letter,
-- 4. must not end with a dash.
'^[a-z]([-](?![-])|[a-z0-9]){1,18}[a-z0-9]$'
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