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Question

In Powershell:

PS C:\> '12345678901234567890' -match '(234).*?(234)(.*?)'
True
PS C:\> $matches

Name                           Value
----                           -----
3
2                              234
1                              234
0                              2345678901234


PS C:\> $matches[3].Length
0

Why is $matches[3] an empty string?  Should it not be '567890'?

Thanks.

Answer 1

It would be if the expression was (234).*?(234)(.*?)$ or (234).*?(234)(.*).

I usually use Expresso to help build and debug Regular Expressions.

---

Paulo Morgado

Answer 2

Hi,

verify that expression on following link.:

Javascript Regular Expression Validator | Regular Expressions Library and Testing Tool

Cheers,