tuple_first_ntuple_first_nTupleFirstNTupleFirstNtuple_first_n (算子名称)

名称

tuple_first_ntuple_first_nTupleFirstNTupleFirstNtuple_first_n — Select the first elements of a tuple up to the index “n”.

参数签名

描述

tuple_first_ntuple_first_nTupleFirstNTupleFirstNTupleFirstNtuple_first_n selects the first elements of TupleTupleTupleTupletupletuple up to the index IndexIndexIndexIndexindexindex and returns them in SelectedSelectedSelectedSelectedselectedselected. Indices of tuple elements start at 0, that means, the first tuple element has got the index 0. In total, IndexIndexIndexIndexindexindex+1 elements are returned.

IndexIndexIndexIndexindexindex must contain a single integer value (or a floating point number that represents an integer value without fraction).

Exception: Empty input tuple

If TupleTupleTupleTupletupletuple is empty, an exception is raised.

HDevelop In-line Operation

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

Selected := firstn(Tuple, Index)

运行信息

• Multithreading type: independent (runs in parallel even with exclusive operators).
• Multithreading scope: global (may be called from any thread).
• Processed without parallelization.

参数表

可替代算子

tuple_last_ntuple_last_nTupleLastNTupleLastNTupleLastNtuple_last_n, tuple_selecttuple_selectTupleSelectTupleSelectTupleSelecttuple_select, tuple_str_bit_selecttuple_str_bit_selectTupleStrBitSelectTupleStrBitSelectTupleStrBitSelecttuple_str_bit_select, tuple_concattuple_concatTupleConcatTupleConcatTupleConcattuple_concat, tuple_select_masktuple_select_maskTupleSelectMaskTupleSelectMaskTupleSelectMasktuple_select_mask

参考其它

tuple_removetuple_removeTupleRemoveTupleRemoveTupleRemovetuple_remove

模块

Foundation

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