what does it means

[ravishanker]

Hi,
$lib .= "/perl/NSE";
unshift(@::INC, "$lib/external"
$::INC[@::INC] = "$lib";
$::NetBin="$::NetDir/bin";
What is the use of ::,what does it mean
(Rs)

 

[tanderso]

I believe :: is used to denote membership, but I could be wrong.
Sincerely,

Tom Anderson
CEO, Order amid Chaos, Inc.

http://www.oac-design.com

 

[stillflame]

One use i can think for it is for precise variable names. In the package Blah, all variables can be accessed from it's symbol table with
$Blah::foo
or
@Blah::arr
simply putting $:: means to look in the current symbol table. When using modules, if you need to be absolutely sure you're using the right name for a variable or subroutine, you can use the :: syntax.

use Module;
$Module::var;
&Module::sub;

I think this is all correct, but while there may be minor errors, i think this has the general feel for it's use.