Square brackets [] are for creating a reference to an anonymous array. Parens () construct a list which you can assign to an array.
You can read more at perldata and perlref

Try This: 

my @array = ( 1, "word", 2 );
my $print_string = join ('|', @array);
print "$print_string\n";

[download]
grep
One dead unjugged rabbit fish later...

In reply to Re: my $var = join('|',@array) not behaving by grep
in thread my $var = join('|',@array) not behaving by stuffy

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