Thank you, yes. That is an important distinction.
-Original Message-
From: Randal L. Schwartz [mailto:[EMAIL PROTECTED]
Sent: Fri 7/16/2004 7:17 AM
To: [EMAIL PROTECTED]
Cc:
Subject: Re: !$state
>>&g
> "Tim" == Tim Johnson <[EMAIL PROTECTED]> writes:
Tim> "$state = ()" assigns the value of an empty list to the scalar $state, so it
would evaluate to false.
No, it doesn't. It evaluates () in a scalar context, which returns a
scalar undef. Hence, same as "$state = undef". Right conclusio
David Arnold wrote:
> All,
>
> If:
>
> $state={};
Now state is a reference to an anonymous HASH
>
> Then, what is:
>
> !$state
This is '' (i.e. "false"), because the ! operator returns 1 ("true") only
for the values '', 0, and undef. Any reference will be "true" in this test,
even a referenc
Tim Johnson said:
>
>
>Someone can probably give a better answer, but practically speaking, this is what
>I've seen to be true (someone please give me a verbal whipping if I'm off here):
>
>Perl evaluates a statement as false if it
>
>a) is undefined
>b) evaluates to 0
>c) evaluates to '' (em
M
To: Tim Johnson
Cc: David Arnold; [EMAIL PROTECTED]
Subject: Re: !$state
so to investigate this further, I want to look at what perl takes as
"Truth". I want to nail down for my own benefit the differences
Harald Richard Ashburner wrote:
Question:
How do I get an index or a table of contents? How do I find out how to search the perldocs for
"control structures"
I've tried:
perldoc perldoc
perldoc -f if
perldoc -q control
perldoc -q index
perldoc -q contents
perldoc -q perldoc
eg
perldoc perltoot
g
Hi Team,
Tested code that prints a value for !$state when $state is initialized
with my $state = ();
#!/usr/local/bin/perl
#
#set $state to () to find out what !$state is
use strict;
use warnings;
$state evaluates as true (I think that's what you're asking).
$state = {};
if($state){
print "\$state is true: $state\n";
}else{
print "\$state is false";
}
$state is true because it's not empty.
It's a referen
Here's a simple version...
$a = 5;
while ($a) {
foreach (1..10) {
if ($_ == $a) {
$exit++;
}
}
last if ($exit);
}
print "\$a is $a\n";
R
At 20:20 27/09/2002 -0700, Michael Kelly wrote:
>On Fri, Sep 27, 2002 at 08:29:53PM -0500, Grant Hansen wrote:
On Fri, Sep 27, 2002 at 08:29:53PM -0500, Grant Hansen wrote:
> Can anyone provide an example of how to use a state variable to break out of a
> loop?
>
> Thanks
I smell homework.
But to be fair: what do you have so far? Why doesn't it do what you want?
If you showed us your code where you wer
Grant Hansen wrote:
>
> Can anyone provide an example of how to use a state variable to break out of a
> loop?
Can you provide an example or explanation of what you are trying to do?
John
--
use Perl;
program
fulfillment
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On Mon, Sep 10, 2001 at 11:27:51AM +0200, Edwin G?nthner wrote:
> The pseudo-hashes have no autovivification - therefore
> $self->{recieve} will result in an error. When using
> hashes, the new hash entry is created without my knowledge.
[snip]
> And as far as I understand there is no way to avoi
Michael Fowler wrote:
> Tearing out the pseudohash code gives an across the board 10-15%
> gain in speed in basic benchmarks. That means if we didn't have
> pseudohashes, normal hashes would be just as fast as fully declared
> pseudohashes!
>
> So don't mourn their passing.
On Mon, Sep 10, 2001 at 10:39:51AM +0200, Edwin G?nthner wrote:
> > They are experimental, and it's not a good idea to rely on them in
> > production code. In fact, pseudo-hashes are on their way out. Typed
>
> Sorry to hear that. I liked the idea to have something more efficient
> than hashes
Hello Michael,
> They are experimental, and it's not a good idea to rely on them in
> production code. In fact, pseudo-hashes are on their way out. Typed
Sorry to hear that. I liked the idea to have something more efficient
than hashes ... on the other hand it is apparent that implementing
ps
On Mon, Sep 10, 2001 at 10:08:15AM +0200, Edwin G?nthner wrote:
> Are pseudo-hashes and typed lexicals still "experimental"
> or is it save to use them in a project that will might
> be used for 3 to 5 years?
They are experimental, and it's not a good idea to rely on them in
production code. In
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