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A comment on How not to check the validity of an email address. Parent comment

Re:How not to check the validity of an email address by ante_annum on Thursday September 05, 2013 @12:26PM (#6335076)
My favorite definition of legacy code is bad code for which no tests exist. It's terrible because people have no idea what to do with it and no idea what they're breaking when they change it.

You could be writing legacy code today.

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