Beefy Boxes and Bandwidth Generously Provided by pair Networks
Keep It Simple, Stupid

Comment on

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


...which is why, as an idiom, it's wise to disconnect the success flag from the return value of the thing_that_may_fail(). I'm glad I'm not alone in seeing merit in the clarity that comes from decoupling the thing that may fail from the idiom that tests it.

The point to "eval "possible_failure(); 1"" is that we're not concerned with possible_failure()'s return value, we're concerned whether or not it threw an exception. We shouldn't have to look up and infer what its return value will be, we should simply test whether it threw an exception or not. That's where 1;" or warn "Woops!"; comes in.


In reply to Re^3: The 'eval "require $module; 1"' idiom (intended) by davido
in thread The 'eval "require $module; 1"' idiom by sedusedan

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 chanting in the Monastery: (3)
    As of 2015-11-25 03:54 GMT
    Find Nodes?
      Voting Booth?

      What would be the most significant thing to happen if a rope (or wire) tied the Earth and the Moon together?

      Results (670 votes), past polls