public class nth extends DefaultInternalAction
Internal action: .nth
.
Description: gets the nth term of a list.
Parameters:
Examples:
.nth(0,[a,b,c],X)
: unifies X
with a
.
.nth(2,[a,b,c],X)
: unifies X
with c
.
.nth(0,[a,b,c],d)
: false.
.nth(0,[a,b,c],a)
: true.
.nth(5,[a,b,c],X)
: error.
concat
,
delete
,
length
,
member
,
sort
,
max
,
min
,
reverse
,
difference
,
intersection
,
union
,
Serialized FormConstructor and Description |
---|
nth() |
Modifier and Type | Method and Description |
---|---|
protected void |
checkArguments(Term[] args) |
static InternalAction |
create() |
java.lang.Object |
execute(TransitionSystem ts,
Unifier un,
Term[] args)
Executes the internal action.
|
int |
getMaxArgs() |
int |
getMinArgs() |
canBeUsedInContext, destroy, prepareArguments, suspendIntention
public static InternalAction create()
public int getMinArgs()
getMinArgs
in class DefaultInternalAction
public int getMaxArgs()
getMaxArgs
in class DefaultInternalAction
protected void checkArguments(Term[] args) throws JasonException
checkArguments
in class DefaultInternalAction
JasonException
public java.lang.Object execute(TransitionSystem ts, Unifier un, Term[] args) throws java.lang.Exception
InternalAction
execute
in interface InternalAction
execute
in class DefaultInternalAction
java.lang.Exception