Depends on your desired result. The first line would allow you to manipulate @array by manipulating the array referenced by $hash{$arg}, thus $hash{$arg}->[0] = 0 changes $array[0]. The second method builds a reference using the values in @array. Thus, modifying the array referenced by $hash{$arg} modifies something totally independent of @array. Either way is perfectly legal/valid, but it depends on what you're wanting to actually do. | [reply]
[d/l]
[select] |
That point is moot, since the array is lexically scoped
(created via my()). So a reference to it would
keep it around after it goes out of scope, so modifying it
doesn't really pose a problem.
Incidentally, there's a bit of optimization to be made in
the program:
sub processfile {
my ($file, $list) = @_;
my $script = "/export/home/limo/Perl/exfields.pl -e";
my %hash;
# no need for @list
for my $arg (split /,/ => $list) {
open(FILE, "$script $arg $file |") or die "System error: $!\n";
while (<FILE>) {
# did you mean /^(#|none|unkno)/ ?
next if /^#|none|unkno/i;
chomp;
$hash{$arg} = [split];
# or, if there'll be another $arg of the same value..
# push @{ $hash{$arg} }, split;
}
close FILE;
}
# consider return a REFERENCE to the hash...
# it might be more memory-effective
return %hash;
}
If more description is needed than the comments provide, let
me know.
$_="goto+F.print+chop;\n=yhpaj";F1:eval | [reply]
[d/l] |
I figured he was asking in the general-case, so that's what my post was geared towards.
| [reply] |
except, when I try and print the returned hash:
my %first_hash = processfile($file2, $list2);
foreach my $k (sort keys %first_hash){
print "$k\n$first_hash{$k}\n";
}
it returns:
MonName
ARRAY(0xcb420)
SrcRtr
ARRAY(0xcb468)
ifSpeed
ARRAY(0xcb444)
rather than the value of the keys. | [reply]
[d/l]
[select] |