Or isn't it simply:
my %result=();
for ( @a, @b ) {
    if ( $result{ $_ } ) {
        delete $result{ $_ };
    }
    else {
        $result{ $_ } = 1;
    }
}

[download]
The required list is now found in ( keys %result )

One world, one people

In reply to Re: Removing array elements by anonymized user 468275
in thread Removing array elements by sandrider

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