mem : 'a -> 'a list -> bool
- SYNOPSIS
-
Tests whether a list contains a certain member.
- DESCRIPTION
-
mem x [x1;...;xn] returns true if some xi in the list is equal to x.
Otherwise it returns false.
- FAILURE CONDITIONS
-
Never fails.
- SEE ALSO
-
find, tryfind, exists, forall, assoc, rev_assoc.