Beefy Boxes and Bandwidth Generously Provided by pair Networks
Clear questions and runnable code
get the best and fastest answer
 
PerlMonks  

Comment on

by gods
on Feb 11, 2000 at 00:06 UTC ( #3333=superdoc: print w/replies, xml ) Need Help??

Update: <homer_simpson_voice>DOH! cloooosures</homer_simpson_voice>
-- I'll leave the text here so that no else who reads this makes the same mistake. :-)

In your call to component_window(), you assign $pcrh and $pid a la     my ($prch,$pid) = @_;
now, I don't see a shift nor a pop nor any other @_ manipulations, which makes your call to tail_lines() incorrect:

sub component_window { my ($prch,$pid) = @_; ... my $tail = Tk::IO->new( -linecommand => sub { tail_lines($prch, $_[0]) }); ... } sub tail_lines { my ($proc,$text) = @_; ... }
because $_[0] is the same as $prch when you call tail_lines($prch, $_[0]), and this seems to be not what you want.

You should be able to either pass the third element directly or get the third element in a var at the top of your sub (i.e.

sub component_window { my ($prch,$pid,$text)=@_; ...
and pass that...
... my $tail = Tk::IO->new( -linecommand => sub { tail_lines($prch, $text) }); ... }

--
hiseldl
What time is it? It's Camel Time!


In reply to Re: Atomic operations in perl and Tk::IO by hiseldl
in thread Atomic operations in perl and Tk::IO by rinceWind

Title:
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?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others chanting in the Monastery: (3)
    As of 2016-09-26 04:57 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      Extraterrestrials haven't visited the Earth yet because:







      Results (475 votes). Check out past polls.