tuple_selecttuple_selectTupleSelectTupleSelecttuple_select (算子)

名称

tuple_selecttuple_selectTupleSelectTupleSelecttuple_select — 选择元组的单个元素。

签名

描述

tuple_selecttuple_selectTupleSelectTupleSelectTupleSelecttuple_select selects one or more single elements of the tuple TupleTupleTupleTupletupletuple and returns them with SelectedSelectedSelectedSelectedselectedselected. At this, IndexIndexIndexIndexindexindex determines the indices of the elements to select. Thus, IndexIndexIndexIndexindexindex may only contain integer values (any floating point number within IndexIndexIndexIndexindexindex must represent an integer value without fraction). Indices of tuple elements start at 0, that means, the first tuple element has got the index 0.

例外：空输入元组

If TupleTupleTupleTupletupletuple is empty, an exception is raised.

HDevelop 内联操作

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

Selected := Tuple[Index]

Selected := subset(Tuple, Index)

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

替代

tuple_first_ntuple_first_nTupleFirstNTupleFirstNTupleFirstNtuple_first_n, tuple_last_ntuple_last_nTupleLastNTupleLastNTupleLastNtuple_last_n, tuple_str_bit_selecttuple_str_bit_selectTupleStrBitSelectTupleStrBitSelectTupleStrBitSelecttuple_str_bit_select, tuple_concattuple_concatTupleConcatTupleConcatTupleConcattuple_concat, tuple_select_rangetuple_select_rangeTupleSelectRangeTupleSelectRangeTupleSelectRangetuple_select_range, tuple_select_ranktuple_select_rankTupleSelectRankTupleSelectRankTupleSelectRanktuple_select_rank

另见

tuple_removetuple_removeTupleRemoveTupleRemoveTupleRemovetuple_remove

模块

基础