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perl-Array-Compare.spec
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File perl-Array-Compare.spec of Package perl-Array-Compare
# # spec file for package perl-Array-Compare # # Copyright (c) 2020 SUSE LLC # # All modifications and additions to the file contributed by third parties # remain the property of their copyright owners, unless otherwise agreed # upon. The license for this file, and modifications and additions to the # file, is the same license as for the pristine package itself (unless the # license for the pristine package is not an Open Source License, in which # case the license is the MIT License). An "Open Source License" is a # license that conforms to the Open Source Definition (Version 1.9) # published by the Open Source Initiative. # Please submit bugfixes or comments via https://bugs.opensuse.org/ # Name: perl-Array-Compare Version: 3.0.8 Release: 0 %define cpan_name Array-Compare Summary: Perl extension for comparing arrays License: Artistic-1.0 OR GPL-1.0-or-later Group: Development/Libraries/Perl URL: https://metacpan.org/release/%{cpan_name} Source0: https://cpan.metacpan.org/authors/id/D/DA/DAVECROSS/%{cpan_name}-v%{version}.tar.gz Source1: cpanspec.yml BuildArch: noarch BuildRoot: %{_tmppath}/%{name}-%{version}-build BuildRequires: perl BuildRequires: perl-macros BuildRequires: perl(Module::Build) >= 0.420000 BuildRequires: perl(Moo) BuildRequires: perl(Test::NoWarnings) BuildRequires: perl(Types::Standard) Requires: perl(Moo) Requires: perl(Types::Standard) %{perl_requires} %description If you have two arrays and you want to know if they are the same or different, then Array::Compare will be useful to you. All comparisons are carried out via a comparator object. In the simplest usage, you can create and use a comparator object like this: my @arr1 = 0 .. 10; my @arr2 = 0 .. 10; my $comp = Array::Compare->new; if ($comp->compare(\@arr1, \@arr2)) { print "Arrays are the same\n"; } else { print "Arrays are different\n"; } Notice that you pass references to the two arrays to the comparison method. Internally the comparator compares the two arrays by using 'join' to turn both arrays into strings and comparing the strings using 'eq'. In the joined strings, the elements of the original arrays are separated with the '^G' character. This can cause problems if your array data contains '^G' characters as it is possible that two different arrays can be converted to the same string. To avoid this, it is possible to override the default separator character, either by passing an alternative to the 'new' function my $comp = Array::Compare->new(Sep => '|'); or by changing the separator for an existing comparator object $comp->Sep('|'); In general you should choose a separator character that won't appear in your data. You can also control whether or not whitespace within the elements of the arrays should be considered significant when making the comparison. The default is that all whitespace is significant. The alternative is for all consecutive white space characters to be converted to a single space for the purposes of the comparison. Again, this can be turned on when creating a comparator object: my $comp = Array::Compare->new(WhiteSpace => 0); or by altering an existing object: $comp->WhiteSpace(0); You can also control whether or not the case of the data is significant in the comparison. The default is that the case of data is taken into account. This can be changed in the standard ways when creating a new comparator object: my $comp = Array::Compare->new(Case => 0); or by altering an existing object: $comp->Case(0); In addition to the simple comparison described above (which returns true if the arrays are the same and false if they're different) there is also a full comparison which returns a list containing the indexes of elements which differ between the two arrays. If the arrays are the same it returns an empty list. In scalar context the full comparison returns the length of this list (i.e. the number of elements that differ). You can access the full comparison in two ways. Firstly, there is a 'DefFull' attribute. If this is 'true' then a full comparison is carried out whenever the 'compare' method is called. my $comp = Array::Compare->new(DefFull => 1); $comp->compare(\@arr1, \@arr2); # Full comparison $comp->DefFull(0); $comp->compare(\@arr1, \@arr2); # Simple comparison $comp->DefFull(1); $comp->compare(\@arr1, \@arr2); # Full comparison again Secondly, you can access the full comparison method directly $comp->full_compare(\@arr1, \@arr2); For symmetry, there is also a direct method to use to call the simple comparison. $comp->simple_compare(\@arr1, \@arr2); The final complication is the ability to skip elements in the comparison. If you know that two arrays will always differ in a particular element but want to compare the arrays _ignoring_ this element, you can do it with Array::Compare without taking array slices. To do this, a comparator object has an optional attribute called 'Skip' which is a reference to a hash. The keys in this hash are the indexes of the array elements and the values should be any true value for elements that should be skipped. For example, if you want to compare two arrays, ignoring the values in elements two and four, you can do something like this: my %skip = (2 => 1, 4 => 1); my @a = (0, 1, 2, 3, 4, 5); my @b = (0, 1, X, 3, X, 5); my $comp = Array::Compare->new(Skip => \%skip); $comp->compare(\@a, \@b); This should return _true_, as we are explicitly ignoring the columns which differ. Of course, having created a comparator object with no skip hash, it is possible to add one later: $comp->Skip({1 => 1, 2 => 1}); or: my %skip = (1 => 1, 2 => 2); $comp->Skip(\%skip); To reset the comparator so that no longer skips elements, call NoSkip(). $comp->NoSkip(); You can also check to see if one array is a permutation of another, i.e. they contain the same elements but in a different order. if ($comp->perm(\@a, \@b) { print "Arrays are perms\n"; } else { print "Nope. Arrays are completely different\n"; } In this case the values of 'WhiteSpace' and 'Case' are still used, but 'Skip' is ignored for, hopefully, obvious reasons. %prep %setup -q -n %{cpan_name}-v%{version} find . -type f ! -path "*/t/*" ! -name "*.pl" ! -path "*/bin/*" ! -path "*/script/*" ! -name "configure" -print0 | xargs -0 chmod 644 %build perl Build.PL installdirs=vendor ./Build build flags=%{?_smp_mflags} %check ./Build test %install ./Build install destdir=%{buildroot} create_packlist=0 %perl_gen_filelist %files -f %{name}.files %defattr(-,root,root,755) %doc Changes README %changelog
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