Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl-Sensitive Sunglasses

Comment on

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

Given the way :lvalue works now, I came to the same conclusion, but then I set about trying to understand what uses it did have, procedural code or otherwise and I came up empty. For a good, practical use anyway, but the documentation is sparse to put it mildy, which is why I decided to move my questions and thoughts away from the original thread.

The fact that I can modify the original entity directly through an lvalue sub may be an optimisation, but I don't see substr($foo, 3, 2) = 'fred'; as intrinsically different from substr($foo, 3, 2, 'fred'); I had never thought of doing nor encountered anything that did:

$s = "the quick brown fox"; substr($s, 4, 5) =~ s/ick/iet/; print $s; the quiet brown fox

And that does have some interesting possibilities and is exactly the sort answer I was looking for. I'd like to see a real use for it and the benefits thereof described, but in the absence, you've given me a new way to look at a facility of perl that I long been intrigued by but have singularly failed to find a good use for.

That said, I still like the syntactic possibility of lvalue assignment for mutators and the only thing stopping that is the exposure of information that the compiler/interpreter has available to it. As I can see at least two ways of making that information available that would not affect its current usage in anyway, and would not break any existing code, I wonder if this would be such a hard thing to do and what objections there could be to doing it?

Like many features of perl, noone would be forced to use it, but it would give those that would like to (Ie. ME:^) another way to do things.

Examine what is said, not who speaks.

In reply to Re: Re: What the [sub]in 'L value do they have? by BrowserUk
in thread What the [sub]in 'L value do they have? by BrowserUk

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 all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others contemplating the Monastery: (5)
    As of 2018-05-20 18:28 GMT
    Find Nodes?
      Voting Booth?