From: Jano Svitok <jan.svitok@...>
Date: 2008-02-13T18:48:45+09:00
Subject: Re: ERB: import function

On Feb 13, 2008 9:10 AM, Ryan Davis <ryand-ruby@zenspider.com> wrote:
>
> On Feb 12, 2008, at 3:48 PM, Alvaro Bautista wrote:
>
> > def import(fn)
> >    e = ""
> >    File.open(fn) do |f|
> >      e = ERB.new(f.read)
> >    end
> >    e.result
> > end
>
> I can't help you with your actual problem, but I can suggest how to
> simplify the code:
>
>    def import path
>      ERB.new(File.read(path)).result
>    end
>

This is halfway to solution:

def import path
    ERB.new(File.read(path), nil, nil, '_x_').result()
end

Notice the other parameters, especially the last one. ERB uses one
variable to store the output. If you don't specify any,
it will use a default one - and each nested ERB will overwrite the new
one. The solution is 1. use another name for each nested import
2. use another binding for each nested import (i.e. make another
scope, and let ERB create another var with the same name
in the new scope/binding, leaving the ability to return to the previous one)

I'll leave the details for your homework ;-)

http://ruby-doc.org/core/classes/ERB.html#M002827

Jano