Re^3: Multiple file input into a perl script

The magic diamond-operator <> only works if you stuff the filenames into @ARGV. But you surely have tried that yourself and merely forgot to tell me that you found your code didn't work the way you wrote it.

I recommend you read up on open to learn how to open and read a single file and process that, and then proceed to do that in the loop:

use strict;
use File::DosGlob qw(bsd_glob);

my @files = glob 'ABi1*';
foreach my $file (@files) {
    open my $fh, '<', $file
        or die "Couldn't read '$file': $!";
    while (<$fh>) {
        ... do your function
    };
    # EOF, do end of file cleanup
};
[download]

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Re^4: Multiple file input into a perl script by broomduster (Priest) on Sep 30, 2008 at 22:11 UTC
The magic diamond-operator <> only works if you stuff the filenames into @ARGV. My reading of I/O Operators has me believing that using the diamond operator for globbing works as the OP seems to expect. Here's what I get with a simple test: `-> ls file1.txt file2.txt file3.txt -> perl -le '@files = <file*>; print @files;' file1.txt file2.txt file3.txt` [download] I may have missed something, but it looks to me that kelder's expectation of how globbing works with `<>` is right. Is there a platform difference to worry about? (OP is on a Mac, above test runs the same on a Mac and under NetBSD.)	[reply] [d/l] [select]
Re^5: Multiple file input into a perl script by Corion (Patriarch) on Oct 01, 2008 at 05:42 UTC
That part works. The empty diamond, used to read the contents of all files (or STDIN) is what doesn't work without setting up @ARGV. That dual use is why I prefer an explicit glob() over the diamond...	[reply]
Re^6: Multiple file input into a perl script by broomduster (Priest) on Oct 01, 2008 at 12:51 UTC
That dual use is why I prefer an explicit glob() over the diamond.. And so do I ;-)... In fact, just last week at $DAYJOB, I had an interesting "discussion" with $COWORKER who is relatively new to Perl and insisted that `while ( <> )` `while ( <file> )` `while ( <@ARGV> )` all do the same thing. When $COWORKER was confronted with examples of the differences, the "problem" morphed first into "a bug in Perl", then to "incorrect documentation", then to "should* do the same thing" (I guess that's progress :-) ). All of which is a long (and hopefully slightly humorous) explanation of why I should have caught what you were saying the first time.	[reply] [d/l] [select]


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