public class concat extends DefaultInternalAction
Internal action: .concat
.
Description: concatenates strings or lists.
Parameters:
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).
delete
,
length
,
member
,
sort
,
substring
,
nth
,
max
,
min
,
reverse
,
difference
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intersection
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union
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Serialized FormConstructor and Description |
---|
concat() |
Modifier and Type | Method and Description |
---|---|
static InternalAction |
create() |
java.lang.Object |
execute(TransitionSystem ts,
Unifier un,
Term[] args)
Executes the internal action.
|
canBeUsedInContext, checkArguments, destroy, getMaxArgs, getMinArgs, prepareArguments, suspendIntention
public static InternalAction create()
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