$data = <<'DATA';
foo 1.1.1.1 foo
bar 22.22.22.22 bar
baz 333.333.333.333 baz
DATA
# this is *wrong*
foreach($data=~ /(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/g){
push @ips, $1;
}
print "Foreach fails and gives:\n";
print "$_\n" for @ips;
@ips = ();
# this is right
while($data=~ /(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/g){
push @ips, $1;
}
print "While works and gives:\n";
print "$_\n" for @ips;
####
$data = <<'DATA';
foo 1.1.1.1 foo
bar 22.22.22.22 bar
baz 333.333.333.333 baz
DATA
foreach($data=~ /(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/g){
push @ips, $_;
}
print "Foreach now gives:\n";
print "$_\n" for @ips;
##
##
open FILE, ";
}
close FILE;