Your code as posted can't run because you're using some kind of fancy quotes that Perl does not support:
&find (‘Q', @fsg)
If you used the warnings pragma, Perl would have told you that you're using the wrong operator for string comparisons. See perlop about eq and == and the difference between the two.
Also, if you plan on doing (much) more than one search, using a hash is likely faster:
sub find {
my ($needle,@hay) = @_;
my $position = 1;
my %haystack = map { $_ => $position++ } @hay;
return $haystack{ $needle }
};
If you look at List::Utils, there is the first subroutine, that also does what your find() subroutine does.
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