tuple_uniqtuple_uniqTupleUniqTupleUniq (Operator)


tuple_uniqtuple_uniqTupleUniqTupleUniq — Discard all but one of successive identical elements of a tuple.


tuple_uniq( : : Tuple : Uniq)

Herror tuple_uniq(const Hlong Tuple, Hlong* Uniq)

Herror T_tuple_uniq(const Htuple Tuple, Htuple* Uniq)

void TupleUniq(const HTuple& Tuple, HTuple* Uniq)

HTuple HTuple::TupleUniq() const

static void HOperatorSet.TupleUniq(HTuple tuple, out HTuple uniq)

HTuple HTuple.TupleUniq()


tuple_uniqtuple_uniqTupleUniqTupleUniqTupleUniq discards all but one of successive identical elements from the input tuple TupleTupleTupleTupletuple and returns the remaining elements in UniqUniqUniqUniquniq. For example, if TupleTupleTupleTupletuple contains the values [0,0,1,1,1,2,0,1], the output tuple UniqUniqUniqUniquniq will contain the values [0,1,2,0,1]. It is allowed to mix strings and numbers in the input tuple.

To get a tuple UniqUniqUniqUniquniq that contains all different entries of TupleTupleTupleTupletuple exactly once, use the operator tuple_sorttuple_sortTupleSortTupleSortTupleSort first. Note however that in this case the output tuple UniqUniqUniqUniquniq is sorted. The result of the above example then is [0,1,2].

Exception: Empty input tuple

If the input tuple is empty, the operator returns an empty tuple.

HDevelop In-line Operation

HDevelop provides an in-line operation for tuple_uniqtuple_uniqTupleUniqTupleUniqTupleUniq, which can be used in an expression in the following syntax:

Uniq := uniq(Tuple)

As mentioned above, you can use tuple_sorttuple_sortTupleSortTupleSortTupleSort to truly get all unique elements of TupleTupleTupleTupletuple.

Uniq := uniq(sort(Tuple))

Execution Information


TupleTupleTupleTupletuple (input_control)  tuple(-array) HTupleHTupleHtuple (integer / real / string) (int / long / double / string) (Hlong / double / HString) (Hlong / double / char*)

Input tuple.

UniqUniqUniqUniquniq (output_control)  tuple(-array) HTupleHTupleHtuple (integer / real / string) (int / long / double / string) (Hlong / double / HString) (Hlong / double / char*)

Tuple without successive identical elements.

Example (HDevelop)

Tuple := [0,0,1,1,1,2,0,1]
tuple_uniq (Tuple, Uniq)
tuple_sort (Uniq, Sorted)
tuple_uniq (Sorted, Uniq1)

Possible Predecessors

tuple_inversetuple_inverseTupleInverseTupleInverseTupleInverse, tuple_sorttuple_sortTupleSortTupleSortTupleSort