my %seen; # Not $seen = ();

1,095 registered users | 0 active users | 0 LpH | Statistics
Login | Create New User

Welcome to IWETHEY!

Post #197,531 by ben_tilly 3/7/05 2:53:31 PM Reply	my %seen; # Not $seen = (); I assume that you want to be sure that %seen is an empty hash, not that the scalar $seen is set to be undef. Using strict catches this common typo. Cheers, Ben I have come to believe that idealism without discipline is a quick road to disaster, while discipline without idealism is pointless. -- Aaron Ward (my brother)
Post #197,537 by admin 3/7/05 4:22:17 PM Reply	shrug I got that from the Perl cookbook. And it does work, incidentally. Regards, -scott anderson "Welcome to Rivendell, Mr. Anderson..."
Post #197,538 by ben_tilly 3/7/05 4:28:56 PM Reply	Yes it does work. Once. Hashes start off empty. But if you put your code into a subroutine and call it twice, the second time around it will still be populated from the first. Incidentally I'm willing to bet, sight unseen, that the actual code in the cookbook got this right. :-P Cheers, Ben I have come to believe that idealism without discipline is a quick road to disaster, while discipline without idealism is pointless. -- Aaron Ward (my brother)
Post #197,539 by admin 3/7/05 4:38:02 PM Reply	Nope, you're right. I misread % as $; the cookbook has it correct. One more reason not to use Perl: it sucks for people with bad eyes. ;-) Regards, -scott anderson "Welcome to Rivendell, Mr. Anderson..."

Perl array question - (pwhysall) - (20) - March 7, 2005, 09:51:52 AM EST

if (grep {$_ eq $thing} @stuff) {...} - (ben_tilly) - (11) - March 7, 2005, 11:08:08 AM EST

Thanks - (pwhysall) - March 7, 2005, 12:04:52 PM EST

grep is cool... - (admin) - (5) - March 7, 2005, 12:08:15 PM EST

Sure beats the old way - (FuManChu) - March 7, 2005, 01:02:55 PM EST

my %seen; # Not $seen = (); - (ben_tilly) - (3) - March 7, 2005, 02:53:31 PM EST

*shrug* I got that from the Perl cookbook. - (admin) - (2) - March 7, 2005, 04:22:17 PM EST

Yes it does work. Once. - (ben_tilly) - (1) - March 7, 2005, 04:28:56 PM EST

Nope, you're right. - (admin) - March 7, 2005, 04:38:02 PM EST

Why I Needed Something Other Than "grep" - (pwhysall) - (3) - March 8, 2005, 03:08:44 AM EST

You may only need one loop... - (ben_tilly) - (1) - March 8, 2005, 09:31:10 AM EST

And there's the rub. - (pwhysall) - March 8, 2005, 12:20:43 PM EST

Post the code - (broomberg) - March 8, 2005, 07:32:37 PM EST

Re: Perl array question - (admin) - (7) - March 7, 2005, 11:14:54 AM EST

woooo.... - (folkert) - March 7, 2005, 11:22:44 AM EST

"other"? - There's another? -NT - (broomberg) - (5) - March 7, 2005, 07:16:12 PM EST

Yes. Ruby. -NT - (ben_tilly) - (4) - March 7, 2005, 07:40:56 PM EST

No, that's the *other* other one. -NT - (admin) - (3) - March 7, 2005, 07:42:42 PM EST

You like TCL?? -NT - (ben_tilly) - (2) - March 7, 2005, 07:59:55 PM EST

Not without a ring, Mister. -NT - (admin) - (1) - March 7, 2005, 08:00:21 PM EST

You prefer to take DOS to bat? -NT - (ben_tilly) - March 7, 2005, 08:28:34 PM EST

You idiot! WE'RE the People's Front of Judea!
52 ms