I'm speaking, of course, of when it's best fit to use a variable/subroutine instead of some other technique.

Accessing the global handle through a subroutine makes it much harder to accidentally clobber it.

True. I didn't think of that, especially since he uses it as foo()->bar, and it's hard to modify it that way. I don't think there's a high risk of accidently modifying this particular variable, but I see your objection.

(Further, it makes clear to anyone reading your code that $handle has a well-defined value that doesn't change, which is kind of nice for maintenance programmers.)

By convention you name those variables in upper-case, so in this case it would be $HANDLE instead. There should be no larger question marks regarding that issue.

I think that the small risk of clobbering the variable is out-matched by the warning feature of variables. It helps to keep code clean, and that is something maintainers also appreciate. I hate seeing unused subs/variables just because the author was too afraid/paranoid to remove them.

Cheers,
-Anomo

In reply to Re: (FoxUni) Re(2): Avoiding global object handle by Anonymous Monk
in thread Avoiding global object handle by Biker

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.