Package jason.stdlib

Class concat

java.lang.Object

jason.asSemantics.DefaultInternalAction

jason.stdlib.concat

All Implemented Interfaces:

InternalAction, Serializable

@Manual(literal=".concat(arg0,arg1[,...],result)",
        hint="concatenates strings or lists",
        argsHint={"the first term","the term to be concatenated with prior","the term to be concatenated with prior ones [optional]","the result of the concatenation"},
        argsType={"term or list","term or list","term or list","string"},
        examples={".concat(\"a\",\"b\",X): X unifies with \"ab\"",".concat(\"a\",\"b\",\"a\"): false",".concat(\"a b\",1,a,X): X unifies with \"a b1a\"",".concat(\"a\", \"b\", \"c\", \"d\", X): X unifies with \"abcd\"",".concat([a,b,c],[d,e],[f,g],X): X unifies with [a,b,c,d,e,f,g]"},
        seeAlso={"jason.stdlib.delete","jason.stdlib.length","jason.stdlib.member","jason.stdlib.sort","jason.stdlib.shuffle","jason.stdlib.substring","jason.stdlib.prefix","jason.stdlib.suffix","jason.stdlib.nth","jason.stdlib.max","jason.stdlib.min","jason.stdlib.reverse","jason.stdlib.difference","jason.stdlib.intersection","jason.stdlib.union"})
public class concat
extends DefaultInternalAction

Internal action: .concat.

Description: concatenates strings or lists.

Parameters:

• + arg[0] ... + arg[n-1] (any term or list): the terms to be concatenated.
  
• +/- arg[n]: the result of the concatenation.

Parameters that are not string are concatenated using the toString method of their class.

Examples:

• .concat("a","b",X): X unifies with "ab".
• .concat("a","b","a"): false.
• .concat("a b",1,a,X): X unifies with "a b1a".
• .concat("a", "b", "c", "d", X): X unifies with "abcd".
• .concat([a,b,c],[d,e],[f,g],X): X unifies with [a,b,c,d,e,f,g].

Note: this internal action does not implement backtrack. You if need backtrack, you can add and use the following rules in your code:

  concat([ ], L, L).
  concat([H|T], L, [H|M]) :- concat(T, L, M).
  

See Also:

• delete
• length
• member
• sort
• substring
• nth
• max
• min
• reverse
• difference
• intersection
• union
• Serialized Form

Constructor Summary

Constructors

Constructor	Description
concat()

Method Summary

Modifier and Type	Method	Description
static InternalAction	create()
Object	execute(TransitionSystem ts, Unifier un, Term[] args)	Executes the internal action.

Methods inherited from class jason.asSemantics.DefaultInternalAction

canBeUsedInContext, checkArguments, destroy, getMaxArgs, getMinArgs, prepareArguments, suspendIntention

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

concat

public concat()

Method Details

create

public static InternalAction create()

execute

public Object execute(TransitionSystem ts,
 Unifier un,
 Term[] args)
               throws Exception

Description copied from interface: InternalAction

Executes the internal action. It should return a Boolean or an Iterator. A true boolean return means that the IA was successfully executed. An Iterator result means that there is more than one answer for this IA (e.g. see member internal action).

Specified by:

execute in interface InternalAction

Overrides:

execute in class DefaultInternalAction

Throws:

Exception