NAME Data::Check::Structure - Check structure of data VERSION This document describes version 0.050 of Data::Check::Structure (from Perl distribution Data-Check-Structure), released on 2020-11-08. SYNOPSIS DESCRIPTION This small module provides several simple routines to check the structure of data, e.g. whether data is an array of arrays ("aoa"), array of scalars ("aos"), and so on. FUNCTIONS None exported by default, but they are exportable. is_aos($data[, \%opts]) => bool Check that data is an array of scalars. Examples: is_aos([]); # true is_aos(['a', 'b']); # true is_aos(['a', []]); # false is_aos([1,2,3, []], {max=>3}); # true Known options: "max" (maximum number of items to check, undef means check all items). is_aoa($data[, \%opts]) => bool Check that data is an array of arrays. Examples: is_aoa([]); # true is_aoa([[1], [2]]); # true is_aoa([[1], 'a']); # false is_aoa([[1],[],[], 'a'], {max=>3}); # true Known options: "max" (maximum number of items to check, undef means check all items). is_aoaos($data[, \%opts]) => bool Check that data is an array of arrays of scalars. Examples: is_aoaos([]); # true is_aoaos([[1], [2]]); # true is_aoaos([[1], [{}]]); # false is_aoaos([[1],[],[], [{}]], {max=>3}); # true Known options: "max" (maximum number of items to check, undef means check all items). is_aoh($data[, \%opts]) => bool Check that data is an array of hashes. Examples: is_aoh([]); # true is_aoh([{}, {a=>1}]); # true is_aoh([{}, 'a']); # false is_aoh([{},{},{a=>1}, 'a'], {max=>3}); # true Known options: "max" (maximum number of items to check, undef means check all items). is_aohos($data[, \%opts]) => bool Check that data is an array of hashes of scalars. Examples: is_aohos([]); # true is_aohos([{a=>1}, {}]); # true is_aohos([{a=>1}, {b=>[]}]); # false is_aohos([{a=>1},{},{}, {b=>[]}], {max=>3}); # true Known options: "max" (maximum number of items to check, undef means check all items). is_hos($data[, \%opts]) => bool Check that data is a hash of scalars. Examples: is_hos({}); # true is_hos({a=>1, b=>2}); # true is_hos({a=>1, b=>[]}); # false is_hos({a=>1, b=>2, c=>3, d=>[]}, {max=>3}); # true (or false, depending on random hash key ordering) Known options: "max" (maximum number of items to check, undef means check all items). is_hoa($data[, \%opts]) => bool Check that data is a hash of arrays. Examples: is_hoa({}) ); # true is_hoa({a=>[]}) ); # true is_hoa({a=>1}) ); # false Known options: "max" (maximum number of items to check, undef means check all items). is_hoaos($data[, \%opts]) => bool Check that data is a hash of arrays of scalars. Examples: is_hoaos({}) ); # true is_hoaos({a=>[]}) ); # true is_hoaos({a=>[1]}) ); # true is_hoaos({a=>1}) ); # false is_hoaos({a=>[{}]}) ); # false Known options: "max" (maximum number of items to check, undef means check all items). is_hoh($data[, \%opts]) => bool Check that data is a hash of hashes. Examples: is_hoh({}) ); # true is_hoh({a=>{}}) ); # true is_hoh({a=>1}) ); # false Known options: "max" (maximum number of items to check, undef means check all items). is_hohos($data[, \%opts]) => bool Check that data is a hash of hashes of scalrs. Examples: is_hohos({}) ); # true is_hohos({a=>{}}) ); # true is_hohos({a=>{b=>1}}) ); # true is_hohos({a=>1}) ); # false is_hohos({a=>{b=>[]}}) ); # false Known options: "max" (maximum number of items to check, undef means check all items). HOMEPAGE Please visit the project's homepage at . SOURCE Source repository is at . BUGS Please report any bugs or feature requests on the bugtracker website When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature. AUTHOR perlancar COPYRIGHT AND LICENSE This software is copyright (c) 2020, 2017, 2014 by perlancar@cpan.org. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.