Setting a global variable from another module is also another dangerous practice. Sometimes it is useful, witness Test::More. However it is a fragility in the code. For instance if there is any possibility that your module can be used twice in the same code, with different defaults, you have no sane behaviour.

Therefore I'd advise you to think very carefully before creating APIs that set some global value, let alone trying to make it easy in your API to do that. There are times when it is clearly so unlikely to cause problems that nobody could reasonably object. But those occasions are few and far between. Test::More should be viewed as far more of the exception than the rule in this respect.

In reply to Re: Re: Re: "use" modifier code via import() by tilly
in thread "use" modifier code via import() by pbeckingham

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.