Beefy Boxes and Bandwidth Generously Provided by pair Networks
Clear questions and runnable code
get the best and fastest answer
 
PerlMonks  

Re^2: Open in for loop/array structure

by duff (Vicar)
on Jun 02, 2008 at 23:45 UTC ( #689775=note: print w/ replies, xml ) Need Help??


in reply to Re: Open in for loop/array structure
in thread Open in for loop/array structure

The expression <$FN$k> reads from the file handle $FN$k

I don't think so. If the text inside <> isn't a simple scalar then the diamond operator turns into glob


Comment on Re^2: Open in for loop/array structure
Select or Download Code
Re^3: Open in for loop/array structure
by pc88mxer (Vicar) on Jun 02, 2008 at 23:47 UTC
    Oh that makes sense now - forgot about the glob operator.
      $filename = <$FN[$k]>; is still bad, though. Using glob without looping over its results makes no sense.
      use strict; use warnings; my @FN = qw( a b ); for my $k (0..$#FN) { my $filename = <$FN[$k]>; print("$filename\n"); }
      a Use of uninitialized value in concatenation (.) or string at 689777.pl + line 6.

      If @FN contains glob patterns, then he wants

      for (@FN) { while (defined(my $filename = glob($_))) { ... } }

      If @FN contains file names (as it seems to), then he wants

      for my $filename (@FN) { ... }

      Although it looks like @FN isn't needed at all.

      for (0..18, 20..28, 30..38) { my $filename = sprintf('out-02-%02d.txt', $_); ... }

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://689775]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others musing on the Monastery: (5)
As of 2015-07-05 09:55 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (61 votes), past polls