Regex Match in Designer

[brysmart]

Hi, Newbie here. I have a process to validate data that uses .lay files currently to do the data checks. I've been asked to try and create a workflow for this and wanted to know how I would replicate the .lay checks with Reg Ex Match. Below is an example of how they are currently checked:

Would I do something like [A-Za-z0-9]* for the first row and then [12]* for the next one.

[Alteryx_Stefan]

Unfortunately, I am not familiar with your code piece but if you want to formulate more complex Regex operations I'd recommend this website that really helped my to level up! regexone.com.