Regex help in JavaScript to validate and extract last number

Question

I am looking to validate an input text against the following pattern in JS/JQuery: P-1-A100 or

R-5-M42 or P-10-B99, etc

The text essentially needs to have the following six parts:

Do I need to take care of escape characters as well. How do I make sure that the input text matches the regular expression.

If it does match, how can I extract the last part (Number)from the input text. I have tried this, but isn't working for me

var isMatch = inputText.match([PR]-\d+-[A-Z]+\d+)

Perhaps, /^[PR]-\d+-[A-Z]+(\d+)$/? Use a capturing group around the subpattern that your are interested in getting from the text. — Wiktor Stribiżew
– Wiktor Stribiżew, Commented Jun 14, 2016 at 9:36

Krzysztof Atłasik · Accepted Answer · 2016-06-14 09:46:34Z

1

You just need to add group to your regex.

var match = inputText.match(/^[PR]-\d+-[A-Z]+(\d+)$/);

If match is not null, then number will be in array on position match[1].

var number = match ? match[1] : null;

EDIT: Added anchors as Aaron suggested.

answered Jun 14, 2016 at 9:39

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