tuple_regexp_select — Select tuple elements matching a regular expression.
tuple_regexp_select( : : Data, Expression : Selection)
tuple_regexp_select applies the regular expression in
Expression to one or more input strings in Data,
and returns the matching string elements in Selection. This
is convenient, e.g., for filtering a list of files obtained using
the operator list_files.
Please refer to the documentation of tuple_regexp_match for syntax
and options of regular expressions. Additionally, tuple_regexp_select
supports the option '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.
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'). If
'filename_encoding' is set to 'locale' (legacy), this
operator always uses the byte mode.
HDevelop provides an in-line operation for tuple_regexp_select,
which can be used in an expression in the following syntax:
Selection := regexp_select(Data, Expression)
Data (input_control) string(-array) → (string)
Input strings to match.
Expression (input_control) string(-array) → (string)
Regular expression.
Default value: '.*'
Suggested values: '.*', 'invert_match', 'ignore_case', 'multiline', 'dot_matches_all', 'newline_lf', 'newline_crlf', 'newline_cr'
Selection (output_control) string(-array) → (string)
Matching strings
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'
tuple_regexp_match,
tuple_regexp_replace,
tuple_regexp_test
Foundation