The square brackets create a brand new array out of nothing--an array without a name--and return a reference to it. By putting @tooldescs in brackets you end up with a reference to a new, anonymous array containing @tooldescs' elements.

You can take a reference to @tooldescs itself using the backslash operator and give -msg that instead:

$bloon->attach( $toollist->Subwidget("scrolled"),
        -balloonposition => 'mouse',
        -msg => \@tooldescs );

[download]

but be forewarned that attach() can now modify @tooldescs directly. If that's OK, then you don't need the brackets, and you can get away with using the backslash. If it isn't, then use the brackets.

See perlreftut and perlref for more.

In reply to Re: TK::Balloon by William G. Davis
in thread TK::Balloon by samizdat

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, details, 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, summary, 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.