Counting functions

Reference documentation for Expressif functions in the text/counting scope.

Name	Overview
count-distinct-chars	Returns the count of distinct chars in the textual argument value. If the value is null or empty then it returns 0. If the value is blank then it returns -1.
count-substring	Returns the count of non-overlapping occurrences of a substring, defined as a parameter, in the argument value.
length	Returns the length of the argument value. If the value is null or empty then it returns 0. If the value is blank then it returns -1.