This module implements a limited query language for logical expressions (AND, OR, NOT, parenthesized, ...etc) and apply it to lists of data for selecting a subset, similar to using "grep" with a block/regexp in the code.
A reason for not using grep with a regular code block directly is that the original impetus for its existence was to allow a user running a command-line tool to submit an arbitrary query for a list the tool had somehow generated (e.g. a list of file names).
The initial approach of having the user pass individual regexes for doing "include/exclude" operations proved to be too limiting if the selection criteria became more complex. Hence the notion of a query language that makes it possible to express more complex combinations of regexes was born.
Matching can be most readily done on plain lists of scalar strings/values, but by providing a 'field accessor', matching can be done against lists of arbitrary objects/hashes using all possible data they contain, including doing both string (regexes, eq/ne/gt/ge/lt/le) as well as numerical (==/!=/>/>=/</<=) comparisons.
Arguably, it may be seen as a 'grep' on steroids :-).
To install this module, run the following commands:
perl Makefile.PL make make test make install
SUPPORT AND DOCUMENTATION
After installing, you can find documentation for this module with the perldoc command.
You can also look for information at:
RT, CPAN's request tracker (report bugs here) http://rt.cpan.org/NoAuth/Bugs.html?Dist=Grep-Query AnnoCPAN, Annotated CPAN documentation http://annocpan.org/dist/Grep-Query CPAN Ratings http://cpanratings.perl.org/d/Grep-Query Search CPAN http://metacpan.org/dist/Grep-Query/
LICENSE AND COPYRIGHT
Copyright (C) 2016 Kenneth Olwing
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