On Sep 11, 12:12 pm, Gavin <[email protected]> wrote:
> When writing Ruby you have the option to end the file early with
> __END__. Anything after the __END__ is assigned to a constant called
> DATA which is available within the file.
>
> I recently tried using this in Rails and it didn't work. Instead I get
> an uninitialized constant exception. Anyone know why?
>
> Has it been disabled in Rails?
>
> thanks
>
> Gavin
The DATA constant is only created for the running script. Thus,
require'd files do not get the DATA constant.
see the following:
x...@amrita:~ $ cat data.rb
puts DATA.read
__END__
helloooooo
x...@amrita:~ $ cat d2.rb
require 'data'
x...@amrita:~ $ ruby data.rb
helloooooo
x...@amrita:~ $ ruby d2.rb
/home/xeno/data.rb:1:in `<top (required)>': uninitialized constant
DATA (NameError)
from d2.rb:1:in `require'
from d2.rb:1:in `<main>'
x...@amrita:~ $
--~--~---------~--~----~------------~-------~--~----~
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