Package jason.stdlib

Class empty

All Implemented Interfaces:
InternalAction, Serializable

@Manual(literal=".empty(argument)", hint="checks whether the argument does not have any term", argsHint="the term whose length is to be determined", argsType="string or list", examples={".empty([]): true",".empty([a,b]): false, the list has at least one term",".empty(\"a\"): false, the argument has at least one term"}, seeAlso="") public class empty extends DefaultInternalAction

Internal action: .empty.

Description: checks whether the argument does not have any term.

Parameters:

  • + argument (string or list): the term whose length is to be determined.

Examples:

  • .empty([]): true.
  • .empty([a,b]): false, the list has at least one term.
  • .empty("a"): false, the argument has at least one term.
See Also: