Rails - Nov 2008 - trouble accessing ruby constants globally

I''m trying to declare a constant in one file and access it in another.
It doesn''t seem to be working.

Here''s my declaration (at the top of a file, remainder of file omitted
for brevity):

NUM_SECTIONS_TO_PARSE = 7

class UserDataFile < File

	def self.parse_file(src_name, parse_progress)

        (other stuff follows)


Here''s where i''m trying to access it:

parse_progress = Array.new(::NUM_SECTIONS_TO_PARSE, ::NOT_YET_PARSED)

it fails with the message: uninitialized constant
NUM_SECTIONS_TO_PARSE

I''ve run into this problem several times before and always somehow
hacked my way around it, but I want to get it right this time. Any
help appreciated.

Yoram
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Why don''t you write File::NUM_SECTIONS_TO_PARSE

On Nov 26, 7:13 am, "yber...-uAjRD0nVeow@public.gmane.org"
<yber...-uAjRD0nVeow@public.gmane.org> wrote:
> I''m trying to declare a constant in one file and access it in
another.
> It doesn''t seem to be working.
>
> Here''s my declaration (at the top of a file, remainder of file
omitted
> for brevity):
>
> NUM_SECTIONS_TO_PARSE = 7
>
> class UserDataFile < File
>
>         def self.parse_file(src_name, parse_progress)
>
>         (other stuff follows)
>
> Here''s where i''m trying to access it:
>
> parse_progress = Array.new(::NUM_SECTIONS_TO_PARSE, ::NOT_YET_PARSED)
>
> it fails with the message: uninitialized constant
> NUM_SECTIONS_TO_PARSE
>
> I''ve run into this problem several times before and always somehow
> hacked my way around it, but I want to get it right this time. Any
> help appreciated.
>
> Yoram
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On Nov 26, 2:13 am, "yber...-uAjRD0nVeow@public.gmane.org"
<yber...-uAjRD0nVeow@public.gmane.org> wrote:
> I''m trying to declare a constant in one file and access it in
another.
> It doesn''t seem to be working.
>
> Here''s my declaration (at the top of a file, remainder of file
omitted
> for brevity):
>
> NUM_SECTIONS_TO_PARSE = 7
>
> class UserDataFile < File
>
>         def self.parse_file(src_name, parse_progress)
>
>         (other stuff follows)
>
> Here''s where i''m trying to access it:
>
> parse_progress = Array.new(::NUM_SECTIONS_TO_PARSE, ::NOT_YET_PARSED)
>
> it fails with the message: uninitialized constant
> NUM_SECTIONS_TO_PARSE
>
> I''ve run into this problem several times before and always somehow
> hacked my way around it, but I want to get it right this time. Any
> help appreciated.
>
Has that file been loaded at the point you try to use that constant?

Fred
> Yoram
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Thanks Fred. I guess I did not fully understand the sequence in which
ruby loads files. I put a "require
''name_of_file_with_constant_declaration''" at the top of
the file in
which I am using the constant and that fixed it.

Yoram

On Nov 26, 5:01 am, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> On Nov 26, 2:13 am, "yber...-uAjRD0nVeow@public.gmane.org"
<yber...-uAjRD0nVeow@public.gmane.org> wrote:
>
> > I''m trying to declare a constant in one file and access it in
another.
> > It doesn''t seem to be working.
>
> > Here''s my declaration (at the top of a file, remainder of
file omitted
> > for brevity):
>
> > NUM_SECTIONS_TO_PARSE = 7
>
> > class UserDataFile < File
>
> >         def self.parse_file(src_name, parse_progress)
>
> >         (other stuff follows)
>
> > Here''s where i''m trying to access it:
>
> > parse_progress = Array.new(::NUM_SECTIONS_TO_PARSE, ::NOT_YET_PARSED)
>
> > it fails with the message: uninitialized constant
> > NUM_SECTIONS_TO_PARSE
>
> > I''ve run into this problem several times before and always
somehow
> > hacked my way around it, but I want to get it right this time. Any
> > help appreciated.
>
> Has that file been loaded at the point you try to use that constant?
>
> Fred
>
> > Yoram
>
>
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