Beefy Boxes and Bandwidth Generously Provided by pair Networks
Do you know where your variables are?

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

If I want to use Perl 5.12 as if it were 5.10 then that is the exception to the rule

If that's true, you are an exception. Most people expect scripts written before Perl 5.12 was released to still run using perl 5.12 (for example).

I doubt it's true though. Contrary to what you say, I suspect you're not ok with new versions of Perl breaking your scripts.

if I have Perl 5.12 installed why should I have to specify: use 5.012;

You don't have to specify «use 5.012;». You just have to specify «use 5.012;» if you want backwards incompatible features of version 5.12. This enables the language to change without breaking backwards compatibility.

For example, «use feature qw( say );» (or «use 5.010;» or «use 5.012;») is required to use the say builtin since not requiring it would break the following program:

sub say { print "foo\n" } say();

In reply to Re: Why version strings? by ikegami
in thread Why version strings? by gunzip

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 musing on the Monastery: (7)
    As of 2021-05-10 22:53 GMT
    Find Nodes?
      Voting Booth?
      Perl 7 will be out ...

      Results (108 votes). Check out past polls.