tuple_uniqtuple_uniqTupleUniqTupleUniqtuple_uniq (算子)

名称

tuple_uniqtuple_uniqTupleUniqTupleUniqtuple_uniq — 丢弃元组中除一个元素外的所有连续相同元素。

签名

描述

tuple_uniqtuple_uniqTupleUniqTupleUniqTupleUniqtuple_uniq discards all but one of successive identical elements from the input tuple TupleTupleTupleTupletupletuple and returns the remaining elements in UniqUniqUniqUniquniquniq. For example, if TupleTupleTupleTupletupletuple contains the values [0,0,1,1,1,2,0,1], the output tuple UniqUniqUniqUniquniquniq 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 UniqUniqUniqUniquniquniq that contains all different entries of TupleTupleTupleTupletupletuple exactly once, use the operator tuple_sorttuple_sortTupleSortTupleSortTupleSorttuple_sort first. Note however that in this case the output tuple UniqUniqUniqUniquniquniq is sorted. The result of the above example then is [0,1,2].

例外：空输入元组

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

HDevelop 内联操作

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

Uniq := uniq(Tuple)

As mentioned above, you can use tuple_sorttuple_sortTupleSortTupleSortTupleSorttuple_sort to truly get all unique elements of TupleTupleTupleTupletupletuple。

Uniq := uniq(sort(Tuple))

执行信息

• 多线程类型：独立（即使使用独占算子也能并行运行）。
• 多线程作用域：全局（可从任何线程调用）。
• 未采用并行化处理。

参数

示例（HDevelop）

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

可能的前趋

tuple_inversetuple_inverseTupleInverseTupleInverseTupleInversetuple_inverse, tuple_sorttuple_sortTupleSortTupleSortTupleSorttuple_sort

替代

tuple_intersectiontuple_intersectionTupleIntersectionTupleIntersectionTupleIntersectiontuple_intersection

模块

基础