Xavier Noria wrote:
> On Tue, Jul 13, 2010 at 2:42 PM, Abder-Rahman Ali
> <abder.rahman.ali / gmail.com> wrote:
> 
>> In "why's poignant guide to Ruby" book, it mentioned that: $LOAD_PATH is
>> a global variable. Isn't this a global "constant"?
> 
> Not really.
> 
> Ruby has no concept of local constants, they are global by definition.
> Constants can't start with a dollar, they must begin with a capital
> letter.
> 
> To say you want a particular variable to be global you use the sigil.
> Global variables are distinguished by the leading dollar sign, and
> have no requirement about the case used in the identifier. There's for
> example $stdout.
> 
> Constants in addition belong to classes and modules, so they may have
> qualified names like ActiveRecord::Base. That means: the object stored
> in the constant Base, that is stored in the object that is stored in
> the constant ActiveRecord, which happens to be a module.
> 
> Variables, either local or global, have no namespaces.

Thanks for your reply. So, is your point here, that anything starting 
with a $ is a global variable, regardless uppercase or lowercase 
letters.

I asked my question since I know that of Rub's convention is that 
constants have to begin with an uppercase letter.
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