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

comment on

( [id://3333]=superdoc: print w/replies, xml ) Need Help??
      map { require Net::DNS } 1;
    Is that a map in void context? Nasty and evil.

I believe that's a minimal demonstration of a bug, rather than "real" code.

On the subject of while(<>) vs. while(my $line = <>), I tend to prefer the former:

  • If I don't have to do much processing for each line, it's usually much nicer to work on $_, as Juerd points out.
  • If I do have a lot of work to do, it's usually in a subroutine call, where this sort of thing isn't an issue (since the scope has changed).

I haven't really thought about it, but if a loop's so complex that you have to assign to an explicit iterator variable just to figure out what's going on (as opposed to a loop where defaulting to $_ would be inappropriate for other reasons), it's probably an indication that the loop needs simplifying.

--
F o x t r o t U n i f o r m
Found a typo in this node? /msg me
The hell with paco, vote for Erudil!


In reply to Re(2): while(<>) { ... } considered harmful by FoxtrotUniform
in thread while(<>) { ... } considered harmful by IlyaM

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Chatterbox?
and the web crawler heard nothing...

How do I use this?Last hourOther CB clients
Other Users?
Others browsing the Monastery: (6)
As of 2024-03-19 09:49 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found