What is "or equal" in perl? Thanks

[perlie_newbie]

What is "or equal" in perl? Thanks

Eg:

my %vacadb;

my $vacadb =
tie(%vacadb,'DB_File',"$Vaca_dir/.$username.db",O_RDWR|O_CREAT,0666) ||
die "Cannot open vacation database: $!\n";

$vacadb{$sendto} ||= 0;

 

[John W. Krahn]

What is "or equal" in perl? Thanks

Eg:

my %vacadb;

my $vacadb =
tie(%vacadb,'DB_File',"$Vaca_dir/.$username.db",O_RDWR|O_CREAT,0666) ||
die "Cannot open vacation database: $!\n";

$vacadb{$sendto} ||= 0;

That is short for:

$vacadb{$sendto} = $vacadb{$sendto} || 0;

Which assigns $vacadb{$sendto} to $vacadb{$sendto} if $vacadb{$sendto} is TRUE
or assigns 0 to $vacadb{$sendto} if $vacadb{$sendto} is FALSE where FALSE can
be undef, 0, '' or '0'.



John

 

[usenet]

[a multi-posted question]

This question was multiposted to PB. Please burn this thread.

 

[John W. Krahn]

[a multi-posted question]

This question was multiposted to PB. Please burn this thread.

Peanut Butter?

PowerBASIC?

Perambulating Babies?

Pornographic Binaries?


John

 

[Dr.Ruud]

John W. Krahn schreef:

usenet:

perlie_newbie wrote:

[a multi-posted question]

This question was multiposted to PB. Please burn this thread.

Peanut Butter?
PowerBASIC?
Perambulating Babies?
Pornographic Binaries?

http://lists.cpan.org/showlist.cgi?name=beginners

Also available at news://nntp.perl.org/perl.beginners

 

[Mumia W.]

[a multi-posted question]

This question was multiposted to PB. Please burn this thread.

Perl-beginner is a totally different forum. It's acceptable to
post the same message in different forums because there's not
guarantee that a person who subscribes to one forum is also
subscribed to the other.

While multi-posting to the same forum (e.g. usenet/usenet)
might be improper, multi-posting to different forums is simply
like talking with different groups of people, and it is not
improper.

And the question has been answered anyway:
http://groups.google.com/groups?selm=UQOyg.179449$771.25101@edtnps89

IOW,

$var ||= 9;
is the same as saying
$var = $var || 9;

 

[perlie_newbie]

Thanks folks.

I confused that I have post the same question in perl beginner.
Sorry for the confusing / "anger" that I have caused.


ok. ok. beer on me went you come to Singapore.


Thanks.

[a multi-posted question]

This question was multiposted to PB. Please burn this thread.

Perl-beginner is a totally different forum. It's acceptable to
post the same message in different forums because there's not
guarantee that a person who subscribes to one forum is also
subscribed to the other.

While multi-posting to the same forum (e.g. usenet/usenet)
might be improper, multi-posting to different forums is simply
like talking with different groups of people, and it is not
improper.

And the question has been answered anyway:
http://groups.google.com/groups?selm=UQOyg.179449$771.25101@edtnps89

IOW,

$var ||= 9;
is the same as saying
$var = $var || 9;

 

[perlie_newbie]

Oops.

Should be " I confessed..."

Thanks folks.

I confused that I have post the same question in perl beginner.
Sorry for the confusing / "anger" that I have caused.


ok. ok. beer on me went you come to Singapore.


Thanks.

perlie_newbie wrote:

[a multi-posted question]

This question was multiposted to PB. Please burn this thread.

Perl-beginner is a totally different forum. It's acceptable to
post the same message in different forums because there's not
guarantee that a person who subscribes to one forum is also
subscribed to the other.

While multi-posting to the same forum (e.g. usenet/usenet)
might be improper, multi-posting to different forums is simply
like talking with different groups of people, and it is not
improper.

And the question has been answered anyway:
http://groups.google.com/groups?selm=UQOyg.179449$771.25101@edtnps89

IOW,

$var ||= 9;
is the same as saying
$var = $var || 9;

 

[usenet]

Perl-beginner is a totally different forum. It's acceptable to
post the same message in different forums because there's not
guarantee that a person who subscribes to one forum is also
subscribed to the other.

Then crosspost if you feel you must. But never multipost. That's
always rude.

 

[John W. Krahn]

Then crosspost if you feel you must. But never multipost. That's
always rude.

This must be a Google thing because I have been a subscriber to the Perl
Beginners *Mailing* *List* for many years and I have not seen that post on the
list. Please keep your Google squabbles on Google and not on Usenet. TIA


John

 

[Matt Garrish]

[a multi-posted question]

This question was multiposted to PB. Please burn this thread.

Although I do enjoy a good bonfire, it would be more helpful to quote
the answer that was given there, or at least crosspost it here so that
it can be discussed in both places. There's nothing worse than a dead
thread that's supposedly answered elsewhere.

Matt

 

[Mumia W.]

Then crosspost if you feel you must. But never multipost. That's
always rude.

Then Mumia W. was about to say:

It is not possible to crosspost to both a usenet
newsgroup and a mailing-list.

Now I remember that the situation with
«beginners-perl[at]perl.org» is complicated. Beginners-perl
/is/ a mailing-list; however, it's reflected to usenet as
perl.beginner which is what you were talking about.

I originally thought you were talking about the mailing-list,
but now I see, using Google, that the OP did multipost to
perl.beginner as well as clp.misc--which is improper.