I actually love chaining methods (I changed a whole lot of methods in XML::Twig so they would return something that can be chained).

What's not to love about being able to write:

  ...
  # handler for warning
  warning => sub { $_->change_tag( 'p')
                     ->set_att( style => "color:red")
                     ->set_prefix( "WARNING: ");
                  },
  ...

[download]

(apart from the fact that you could do all of this with CSS of course ;--) ?

I agree that sometimes it can get a little confusing though, when the returned object/value is not obvious: should $elt->delete_atts return the element, so you can chain method calls on it, or should it return the attribute hash so you can store it?

Overall I think it makes for elegant code. You'll get use to it ;--)

In reply to Re: chaining method calls by mirod
in thread chaining method calls by perrin

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.