Comma Separated Numbers Regex
RegexRegex Problem Overview
I am trying to validate a comma separated list for numbers 1-8.
i.e. 2,4,6,8,1 is valid input.
I tried [0-8,]* but it seems to accept 1234 as valid. It is not requiring a comma and it is letting me type in a number larger than 8. I am not sure why.
Regex Solutions
Solution 1 - Regex
[0-8,]* will match zero or more consecutive instances of 0 through 8 or ,, anywhere in your string. You want something more like this:
^[1-8](,[1-8])*$
^ matches the start of the string, and $ matches the end, ensuring that you're examining the entire string. It will match a single digit, plus zero or more instances of a comma followed by a digit after it.
Solution 2 - Regex
/^\d+(,\d+)*$/
- for at least one digit, otherwise you will accept 1,,,,,4
Solution 3 - Regex
[0-9]+(,[0-9]+)+
This works better for me for comma separated numbers in general, like: 1,234,933
Solution 4 - Regex
You can try with this Regex:
^[1-8](,[1-8])+$
Solution 5 - Regex
If you are using python and looking to find out all possible matching strings like XX,XX,XXX or X,XX,XXX or 12,000, 1,20,000 using regex
string = "I spent 1,20,000 on new project "
re.findall(r'(\b[1-8]*(,[0-9]*[0-9])+\b)', string, re.IGNORECASE)
> Result will be ---> [('1,20,000', ',000')]
Solution 6 - Regex
You need a number + comma combination that can repeat:
^[1-8](,[1-8])*$
If you don't want remembering parentheses add ?: to the parens, like so:
^[1-8](?:,[1-8])*$