I can see what you mean. Most of the examples show two arrays, but trying it with three arrays like this works:
#!/usr/bin/perl

use strict;
use warnings;
use Set::Intersection;

my @arr1 = qw/0 1 2 3 4 5 6 7 8 9/;
my @arr2 = qw/1 2 3 4 6 8  10  12 14/;
my @arr3 = qw/1 2 3 5 7 9  11 13 15/;
  
my @intersection = get_intersection(\@arr1, \@arr2, \@arr3);

print reverse (@intersection), "\n";

[download]
It returns 123.

In reply to Re: Array comparison for 3 arrays by Khen1950fx
in thread Array comparison for 3 arrays by terrylau

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