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Re^2: Sequential defined-or operators

by naikonta (Curate)
on Jan 14, 2008 at 09:38 UTC ( #662270=note: print w/ replies, xml ) Need Help??


in reply to Re: Sequential defined-or operators
in thread Sequential defined-or operators

It's wonderful, ikegami! My worries disappear right away.


Open source softwares? Share and enjoy. Make profit from them if you can. Yet, share and enjoy!


Comment on Re^2: Sequential defined-or operators
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Re^3: Sequential defined-or operators
by ikegami (Pope) on Jan 14, 2008 at 12:18 UTC

    Just be careful with precedence. Absent prototypes overriding the default,

    my $value = $hash{$arg} // func $arg // 'default';
    means
    my $value = $hash{$arg} // func($arg // 'default');

    Putting parens around the low precedence bit solves the problem.

    my $value = $hash{$arg} // (func $arg) // 'default';

    Of course, with functions, you can also do

    my $value = $hash{$arg} // func($arg) // 'default';
      Yes, I'm aware about this issue. I wrote related matter sometime ago. So I believe it will be perfectly fine to write:
      my $value = $hash{$key} // func $arg // 'default';
      knowing that func is a unary operator.

      Open source softwares? Share and enjoy. Make profit from them if you can. Yet, share and enjoy!

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