Is this what you mean?

*TGlob;  # Create a typeglob named 'TGlob'.
print "It's there!\n" if exists $::{'TGlob'};
__OUTPUT__
It's there!

[download]

Update: Just to clarify.... Typeglobs are the containers for Perl's package global variables. Really they're symbol entries in a particular package's symbol table hash. Package main's symbol table is accessed via %::, or %main::. I'm just checking the global symbol table to see if an entry exists for a particular symbol. If it exists, you've got a typeglob.


Dave

In reply to Re: exists *{$glob} ? (+) by davido
in thread exists *{$glob} ? (+) by BrowserUk

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.