tuple_regexp_selecttuple_regexp_selectTupleRegexpSelectTupleRegexpSelecttuple_regexp_select (算子名称)

名称

tuple_regexp_selecttuple_regexp_selectTupleRegexpSelectTupleRegexpSelecttuple_regexp_select — Select tuple elements matching a regular expression.

参数签名

描述

tuple_regexp_selecttuple_regexp_selectTupleRegexpSelectTupleRegexpSelectTupleRegexpSelecttuple_regexp_select applies the regular expression in ExpressionExpressionExpressionExpressionexpressionexpression to one or more input strings in DataDataDataDatadatadata, and returns the matching string elements in SelectionSelectionSelectionSelectionselectionselection. This is convenient, e.g., for filtering a list of files obtained using the operator list_fileslist_filesListFilesListFilesListFileslist_files.

Please refer to the documentation of tuple_regexp_matchtuple_regexp_matchTupleRegexpMatchTupleRegexpMatchTupleRegexpMatchtuple_regexp_match for syntax and options of regular expressions. Additionally, tuple_regexp_selecttuple_regexp_selectTupleRegexpSelectTupleRegexpSelectTupleRegexpSelecttuple_regexp_select supports the option 'invert_match'"invert_match""invert_match""invert_match""invert_match""invert_match", which causes those input strings to be selected which do not match the regular expression.

For general information about string operations see Tuple / String Operations.

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

Unicode code points versus bytes

Regular expression matching operates on Unicode code points. One Unicode code point may be composed of multiple bytes in the UTF-8 string. If regular expression matching should only match on bytes, this operator can be switched to byte mode with set_system('tsp_tuple_string_operator_mode','byte')set_system("tsp_tuple_string_operator_mode","byte")SetSystem("tsp_tuple_string_operator_mode","byte")SetSystem("tsp_tuple_string_operator_mode","byte")SetSystem("tsp_tuple_string_operator_mode","byte")set_system("tsp_tuple_string_operator_mode","byte"). If 'filename_encoding'"filename_encoding""filename_encoding""filename_encoding""filename_encoding""filename_encoding" is set to 'locale'"locale""locale""locale""locale""locale" (legacy), this operator always uses the byte mode.

HDevelop In-line Operation

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

Selection := regexp_select(Data, Expression)

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

例程 (HDevelop)

tuple_regexp_select (['.','..','mydir','a.png','b.txt','c.bmp','d.dat'], \
                     '.(bmp|png)', Result)
* Returns ['a.png','c.bmp']

tuple_regexp_select (Files, ['training','invert_match'], Matches)
* Returns all file names that do *not* contain the string 'training'

可替代算子

tuple_selecttuple_selectTupleSelectTupleSelectTupleSelecttuple_select

参考其它

tuple_regexp_matchtuple_regexp_matchTupleRegexpMatchTupleRegexpMatchTupleRegexpMatchtuple_regexp_match, tuple_regexp_replacetuple_regexp_replaceTupleRegexpReplaceTupleRegexpReplaceTupleRegexpReplacetuple_regexp_replace, tuple_regexp_testtuple_regexp_testTupleRegexpTestTupleRegexpTestTupleRegexpTesttuple_regexp_test

模块

Foundation

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