Question

i have validating a clothes size field, and want it to accept only numbers and specific “words” like S, M, XL, XXL etc. But i am unsure how to add the words to the pattern. For example, i want it to match something like “2, 5, 23, S, XXXL” which are valid sizes, but not random combinations of letters like “2X3, SLX”

Ok since people are not suggesting regexp solutions i guess i should say that this is part of a larger method of validation which uses regexp. For convenience and code consistency i want to do this with regexp.

Thanks

Answer 1

If they’re a known set of values, I am not sure a regex is the best way to do it. But here is one regex that is basically a brute-force match of your values, each with a \b (word boundary) anchor

\b2\b|\b5\b|\b23\b|\bXXXL\b|\bXL\b|\bM\b|\bS\b