Package jason.stdlib
Class concat
java.lang.Object
jason.asSemantics.DefaultInternalAction
jason.stdlib.concat
- All Implemented Interfaces:
InternalAction
,java.io.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.
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
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Field Summary
Fields Modifier and Type Field Description private static InternalAction
singleton
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Constructor Summary
Constructors Constructor Description concat()
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Method Summary
Modifier and Type Method Description static InternalAction
create()
java.lang.Object
execute(TransitionSystem ts, Unifier un, Term[] args)
Executes the internal action.(package private) java.lang.String
getPlainValue(Term t)
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
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Field Details
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singleton
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Constructor Details
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concat
public concat()
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Method Details
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create
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execute
public java.lang.Object execute(TransitionSystem ts, Unifier un, Term[] args) throws java.lang.ExceptionDescription 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 interfaceInternalAction
- Overrides:
execute
in classDefaultInternalAction
- Throws:
java.lang.Exception
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getPlainValue
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