The operator of the first comparison in a filter, negated or not, that gives % or _ to a pattern (hasPatternWildcard, PLAN §11.11); undefined when none does
%
_
hasPatternWildcard
undefined
The operator of the first comparison in a filter, negated or not, that gives
%or_to a pattern (hasPatternWildcard, PLAN §11.11);undefinedwhen none does