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Re^2: Is there a way to compare strings without using an array?

by Jeri (Scribe)
on Oct 18, 2011 at 19:34 UTC ( #932224=note: print w/ replies, xml ) Need Help??


in reply to Re: Is there a way to compare strings without using an array?
in thread Is there a way to compare strings without using an array?

say for $line1 =~ /[$line2]/g;

it complains...

Bareword "say" not allowed while "strict subs"

when I delete say, it complains...

syntax error at evan.pl line 8, near "$line1 =~"

What's the trick to this sting comparison?

thanks!


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Re^3: Is there a way to compare strings without using an array? (say)
by toolic (Chancellor) on Oct 18, 2011 at 19:45 UTC
      thanks, it's working

      Why is it necessary to use 'say'? If I took out..

      use feature 'say';

      and the 'say' in...

       say for $line1 =~ /[$line2]/g;

      Why doesn't it work?

        The reason is because say is not (yet) a built-in function. You have to import the function into your namespace first, hence use feature 'say';

        Alternatively, you can just use print, which does not implicitly add the new line for you like say does.

        print "$_\n" for $line1 =~ /[$line2]/g;
        You can also add the -l (dash elle) modifier to your "shebang" line which essentially makes print behave like say:
        #!/path/to/perl -l ... print for $line1 =~ /[$line2]/g;
        Hope this helps!

        jeffa

        L-LL-L--L-LL-L--L-LL-L--
        -R--R-RR-R--R-RR-R--R-RR
        B--B--B--B--B--B--B--B--
        H---H---H---H---H---H---
        (the triplet paradiddle with high-hat)
        

        use feature qw( say ); or equivalent is required for backwards compatibility reasons. Many scripts and modules already had a sub named say when say was added to Perl, so it's not available by default in order to avoid breaking these scripts and modules.

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