Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl: the Markov chain saw

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
> Keep in mind that perl currently doesn't do nested subs
Ack, how un-DWIM!
sub foo { my $x = "a var in foo()"; sub bar { print "\$x is - [$x]\n"; } } bar(); __output__ $x is - []
But if we use a closure, all is well with the scope of $x
sub foo { my $x = "a var in foo()"; return sub { print "\$x is - [$x]\n"; } } foo()->(); __output__ $x is - [a var in foo()]
I was vaguely aware of the fact that nested subs in perl were broken (i.e scoped to current package, not current sub) and now I know the full extent (but I guess the logic should've followed really). Oh well, not much longer til Perl6 anyway ...


In reply to Re: Re: Scoping issue when sorting with subroutines by broquaint
in thread Scoping issue when sorting with subroutines by Dave05

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?

    What's my password?
    Create A New User
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others chanting in the Monastery: (3)
    As of 2018-05-28 06:05 GMT
    Find Nodes?
      Voting Booth?