Beefy Boxes and Bandwidth Generously Provided by pair Networks
Syntactic Confectionery Delight

comment on

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

yet the code worked on the first run through (the error version with filehandles included) and not on subsequent iterations, but I'm happy it works.

You weren't using file handles. As already explained, you were using glob. And glob in scalar context acts as an iterator. The first time it's called, it returns the first match. The second time it's called, it returns the second match. And so on. When it's done, it returns undef. I've demonstrated that earlier in this thread.

The first time you called <$FH[$k]> (when $k==0), it returns the first result for $k==0.
The second time you called <$FH[$k]> (when $k==1), it returns the second result for $k==0 (undef).

but from then ($k>0) on I get an error that says "print() closed on filehandle OUT at isotopes-p7.perl line 14"

You told print to output to OUT (select (OUT);), but you closed OUT. Personally, I would remove the call to select and change
print "$BU[$i-1] $MA1[$i-1] $MA2[$i-1]\n";
print OUT "$BU[$i-1] $MA1[$i-1] $MA2[$i-1]\n";
I don't like using select. As you've encountered first hand, it introduces problems too easily.

In reply to Re^3: Open in for loop/array structure by ikegami
in thread Open in for loop/array structure by igotlongestname

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?

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

How do I use this? | Other CB clients
Other Users?
Others pondering the Monastery: (5)
As of 2023-02-08 13:11 GMT
Find Nodes?
    Voting Booth?
    I prefer not to run the latest version of Perl because:

    Results (42 votes). Check out past polls.