Hi,

No that was not me.

And I now understand what has happened. So I have changed the code. And you are right, just because my code looks good does not mean it's good. 
use strict;
use warnings;
my @arr = (1, 2, 3, 4);

sub do_it_all {
    my $biggest = $_[0] ;
    foreach my $num (@_) {
        if ($num > $biggest) {
            $biggest = $num;
        }
    }

        my $smallest =  $_[0];
        foreach my $smallnum (@_) {
            if ($smallnum < $smallest) {
                $smallest = $smallnum;
            }
        }
            print "\$smallest = $smallest\t\$biggest = $biggest\n";
            my @unique = ($smallest..$biggest);
        print "@unique\n";
        
}

&do_it_all(@arr);

[download]

And it now correctly prints: 

C:\>perl anomalous_func.pl
$smallest = 1   $biggest = 4
1 2 3 4

[download]

Update: I have updated the main thread with your observation. Thank you very much. I did a stupid mistake that should have been avoided at all costs.

Thinkpad T430 with Ubuntu 16.04.2 running perl 5.24.1 thanks to plenv!!

In reply to Re^4: add missing elements and remove duplicates....and some more questions. by pritesh_ugrankar
in thread add missing elements and remove duplicates....and some more questions. by pritesh_ugrankar

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