For some background on the principles behind the LanX's excellent points, see Information hiding -- the general idea is to hide your module's implementation (which is likely to change over time) from the (possibly many) programs that call it. So don't just blindly export all your module's variables! Instead, think harder about designing a good module interface, one that will stand the test of time, and so allow you to make many future module improvements without needing to update in step all your programs that use it.

This topic is discussed in much more detail at: On Interfaces and APIs

In reply to Re^2: Do I have to export all variables and functions from my PM file? by eyepopslikeamosquito
in thread Do I have to export all variables and functions from my PM file? by SergioQ

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.