How to Check if a String is Empty
To identify is a string is empty use the following construct:
Pass a string value into a "Regex Extract" app that check for the regex .+
(which will match any string that has at least one character).
Then, join the string array output from the regex app (this converts the string array to a string). Then run it through an "If" operator that checks if the string is not equal to null
.
This works because the "Regex Extract" app will return null
if there was no match for the regex (in this case, .+
which means the string is empty).