^((25[0 5]|2[0 4][0 9]|[01] [0 9][0 9] ) ){3}(25[0 5]|2[0 4][0 9]|[01] [0 9][0 9] )$

^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$ | code-memes, express-memes, comment-memes, regular expression-memes | ProgrammerHumor.io
code-memes, express-memes, comment-memes, regular expression-memes | ProgrammerHumor.io

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"Good code should be self explanatory and obvious without comments." Regular expressions:

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