From: dblack@...
Date: 2003-05-09T07:01:04+09:00
Subject: Re: Can a global be a constant?

Hi --

On Fri, 9 May 2003, Jim Freeze wrote:

> Hi
>
> I just noticed this (after 2 yrs). It appears that a
> capitalized global is not considered a constant.
>
> $D = true  # ok
> $D = false # ok
> F = true   # ok
> F = false  # -:4: warning: already initialized constant F
>
> Why is this?

Because a capitalized global variable is a variable :-)

Same thing with instance variables:

$ ruby -e "A=1; A=2; @B=1; @B=2"
-e:1: warning: already initialized constant A

Once something doesn't begin with [A-Z], it can't be a constant.


David

-- 
David Alan Black
home: dblack@superlink.net
work: blackdav@shu.edu
Web:  http://pirate.shu.edu/~blackdav