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Asked: 2026-05-31T03:00:21+00:00

I am trying to learn regular expressions and was hoping someone could help me

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I am trying to learn regular expressions and was hoping someone could help me out. WOuld appreciate if someone can help me come up with a regular expression to validate that an input must be of the form

Graph: XY5, YZ4, ST7

Each part such as XY5 represents an edge in the graph and the number represents a the edge weight. There can be any number of such edges.

This is what I have till now. It’s probably not correct

"^Graph:\\s{1}[A-ZA-Z\\d,\\s]+"
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1 Answer

  1. Editorial Team

    This might be what you’re looking for:

    /^Graph: (?:[A-Z]{2}\d(?:$|, ?))+/

    See it here in action: http://regexr.com?309av

    Here’s an explanation of what the regex does (screenshot from RegexBuddy, which is probably the best tool for you if you’re trying to learn Regular Expressions):

    enter image description here

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