I want to write regular expression like 1, 2, 3, 4, 5-31 in the text box

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User can enter only 1,2,3.. to 31 number with , separated and user may write in short 1-31 or 1,2,3,4,5,6,7,8,9,10-30 in the textbox

plese help

What I have tried:

i am still trying but still not find any solution yet

Posted 23-May-16 7:34am

Deepak Kr Choudhary

Updated 23-May-16 8:06am

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Prateek Dalbehera 23-May-16 13:59pm

Just find a workaround, if it matches your requirement, you can try it:
Replace '-' in the string if any & then spilt wrt ','.

$("#txt").val().replace('-',',').spilt(',');
Now, in the array, there should be only integers... but you can also think of a REgex for the same.

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OriginalGriff · Answer 1 · 2016-05-23T08:05:00

Basically, don't use a regex. it's possible, but it's horribly complex - partly because you don't want the user to be able to write "7-3", or "2,2,2,2,2", but you do want to allow "1, 3, 4, 17-21, 29" Regexes aren't good at comparing values to ensure they are in sequence!
Instead, use code (possibly with a regex to break out the numbers from the separators, which is pretty trivial) and look at what is generated there. It'll be a lot simpler, much easier to understand, and a lot, lot more maintainable in future.