c - What is the arity of , operator? - Stack Overflow Arity is the number of operand(s) an operator can take For example, + , - , * and are the operators that can be used as both unary (one operand) and binary (two operands) ?: is the only operator which takes three operands (that's why it is called ternary operator)
What is the arity of a relation? - Mathematics Stack Exchange The arity of a relation (or predicate) is the dimension of the domain in the corresponding Cartesian product I do not understand what this means and do not see an explanation on that page What is a relation's corresponding Cartesian product?
Cucumber arity mismatch: trying to bind several matching groups to a . . . Arity mismatch: does nothing to do with your regex, rather your Given I'm a user line is mismatching with your method signature public void aUserExists(String username) throws Throwable { } take out the string argument and try again