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Asked: 2026-06-12T19:47:00+00:00

I am trying to verify if a string is properly formatted. Below are a

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I am trying to verify if a string is properly formatted. Below are a few of the formats that come through. These are just random typed items.

1abc.abc

ab2.abc

abc.abc.abt

aerj/adfa.tht

The before the . can be symbols alpha and numeric. After the . The check im trying to do is check the end of the string for the . followed by no more than 4 alpha characters. I believe this can be done with regex but I do not know where to start on it.

An invalid string is anything containing numbers, symbols or greater than 4 characters following the period

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1 Answer

  1. Editorial Team

    You should go with regex pattern /\.[a-zA-Z]{0,4}$/

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