Applies to: Ephesoft Transact 4.5.0.0 and above

How do you create a regular expression to allow blank values as an option during validation?

Regular Expression

Combine your regular expression with the regular expression for a blank (empty/null) space using the pipe symbol ( | ).

This regex validates blank spaces:

 ^\s*$

Example:

The following regex will accept “yes”, “no” or empty space as a validation rule.

yes|no|^\s*$