Beefy Boxes and Bandwidth Generously Provided by pair Networks
Think about Loose Coupling

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
This looks to me to be an example of believing that a fundamental issue can be fixed by renaming what you are doing.

It doesn't work like that.

The effect that you are trying to achieve is that of a global. If you succeed in achieving that effect, you will have all of the fundamental design advantages and disadvantages that globals have. (They do have both.) The mechanism that you use to achieve the effect has no relevance beyond the fact that you are imposing overhead and obscuring what you are doing.

This is why I recommend that people not just understand that something is bad, but also understand why it is bad. We tend to complain of "cargo cult" code where people borrow code by rote without understanding. But the flip side of the same coin is no better in the end, accepting that certain labels are bad without understanding why.

Therefore, unless you want a specific subtly different effect than what globals give, I would be honest about it and just declare a global with vars. Oh, every alternative will have small advantages and disadvantages over this. For instance using a single global hash gives you only "one" global - but you impose overhead and lose typo checking.

For more on the issues with globals, and how changing the label does (not) address them, see Pass by reference vs globals.

In reply to Re (tilly) 1: using strict and functions by tilly
in thread using strict and functions by idunno

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 the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others about the Monastery: (5)
    As of 2021-01-20 19:47 GMT
    Find Nodes?
      Voting Booth?