Hello NetWallah,

Your first assignment to @ARGV is actually an I/O command (because it uses <>).

Sorry, no:

13:35 >perl -MO=Deparse 1848_SoPW.pl
use File::Glob ();
@ARGV = glob('/cygdrive/c/Users/abc123/Documents/dude/logs/*.log');
while (defined($_ = readline ARGV)) {
    ();
}
1848_SoPW.pl syntax OK

13:35 >

[download]

To dotowwxo:

From the documentation for glob:

Note that glob splits its arguments on whitespace and treats each segment as separate pattern. As such, glob("*.c *.h") matches all files with a .c or .h extension.

So, so specify multiple directories, you simply include each in the expression input to glob. But if you have a lot of directories, it may be more convenient to do something like this:

my @dirs = qw( dir1 dir2 );   # add more as required
@ARGV = ();
push @ARGV, <./1848_SoPW/$_/*\.log> for @dirs;

[download]

or, equivalently,

my @dirs = qw( dir1 dir2 );
@ARGV = map { <./1848_SoPW/$_/*\.log> } @dirs;

[download]

Update: The problem described by NetWallah above will occur if @ARGV should happen to be empty when the while (<>) { loop is entered. So it’s safer to handle this as a special case:

use strict;
use warnings;

my @dirs = qw( dir1 dir2 );
@ARGV = map { <./1848_SoPW/$_/*\.log> } @dirs;

if (@ARGV)
{
    while (<>)
    {
        ...
    }
}

[download]

Hope that helps,

Athanasius <°(((>< contra mundum Iustus alius egestas vitae, eros Piratica,

In reply to Re^2: Looping through multiple directories by Athanasius
in thread Looping through multiple directories by dotowwxo

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