Question

I have regexp pattern like this:

^[a-zA-Z0-9]+\s(INV|FINAL)\s([0,1]?\d{1}\s(([0-2]?\d{1})|([3][0,1]{1}))\s(([1]{1}[9]{1}[9]{1}\d{1})|([2-9]{1}\d{3})))(\s{1})\d+$

This pattern should validate if the document name is correct
Document name like this should match this pattern:

1207181 FINAL 12 13 12 1533

At the beginning – just numbers, it’s like id.

Next one space.

Next INV or FINAL word.

Next date in format dd mm yy.

Next some digits.

Can anybody help me to resolve this?

Answer 1

You’re searching for:

^(\d+)\s(INV|FINAL)\s(0[1-9]|[12]\d|3[01])\s(0[1-9]|1[0-2])\s(\d{2})\s(\d+)$

Explanation:

^                      start at the beginning of the string
(\d+)                  capture any digit
\s                     one whitespace
(INV|FINAL)            captrue INV or FINAL
0[1-9]                 a 0 and a digit from 1 to 9
[12]\d                 a 1 or a 2 and a digit
3[01]                  a 3 and a 0 or a 1
(0[1-9]|[1-2]\d|3[01]) capture a digit from 01 to 31
(0[1-9]|1[0-2])        capture a 0 and a digit from 1 to 9 or a 1 and a digit from 0 to 2 | so capture a digit from 01 to 12
(\d{2})                capture two digits
$                      stop at the end of the string

It won’t match 1207181 FINAL 12 13 12 1533 because of the 13.