Current Perl documentation can be found at perldoc.perl.org.
Here is our local, out-dated (pre-5.6) version:
You can use this if you care about the index:
for ($i=0; $i < @array; $i++) { if ($array[$i] eq "Waldo") { $found_index = $i; last; } }
Now $found_index
has what you want.