Add method List::assoc and List::assoc-value, assoc like the lisp's assoc function and assoc-value is same as $foo assoc v : cdr.
Add method List::assoc and List::assoc-value, assoc like the lisp's assoc function and assoc-value is same as $foo assoc v : cdr.

mitchan0321/perfume,mitchan0321/perfume,mitchan0321/perfume,mitchan0321/perfume,mitchan0321/perfume