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| #!/usr/bin/perl -w
use strict;
use warnings;
use Data::Dumper;
sub array_diff {
# arrays @a and @b to be compared
# listes a et b à comparer
my (@a, @b) = @_;
my @isect;
my @union;
my @diff;
my $e;
my %count;
my %hash_of_arrays;
# check entries
# vérifier le type des listes en entrées qui doivent être de type "ARRAY"
if ( (ref (\@a) ne "ARRAY") || (ref (\@b) ne "ARRAY") ) {
print "entries shall be ARRAY";
exit 0;
}
# store all keys into an hash $count
# stocker les clés dans un hash
foreach $e (@a, @b) { $count{$e}++ }
# browse the hash $count
# balayer le hash
foreach $e (keys %count) {
# union is simple
push(@union, $e);
# intersection
if ($count{$e} == 2) {
push @isect, $e;
# difference
} else {
push @diff, $e;
}
}
# store resulting arrays into an hash of arrays
# stocker les résultats dans un hash
$hash_of_arrays{diff} = \@diff;
$hash_of_arrays{union} = \@union;
$hash_of_arrays{isect} = \@isect;
return %hash_of_arrays ;
}
# Testing the function
my @arr1 = ( "foo", "bar", "truc", "bidule", 1 , 2, 3);
my @arr2 = ( "foo", "car", "truc", "bidule", 1 , 2, 4);
my %result;
# global hash result
%result = &array_diff(@arr1, @arr2);
print Dumper(\%result);
# diff only
my $diff = $result{diff};
print Dumper($diff);
# Diff Output: '3', 'car', 'bar', '4'
# Union Output : 'truc', '3', 'car', '2', 'bar', '1', '4', 'foo', 'bidule'
# Intersection Ouput : 'truc', '2', '1', 'foo', 'bidule' |
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