set_comparator(a_comparator)

Set a custom comparator to the instance.

A custom comparator script must have following specification.

• do handler which have two positional parameters.
• do handler return following values
  • 1 : first argument > second argument
  • 0 : first argument = second argument
  • -1 : first argument < second argument

• a_comparator (script object)

script object : me