From: Szymon Drejewicz <drejewic@...>
Date: 2004-04-21T20:04:05+09:00
Subject: Re: binding - how to get current script?

>   name = nil
>   eval("name = 'Alice'")
>   puts name
> 
> You can change existing variables, but cannot add new
> variables.

It's nice to know that eval() works in this way. Maybe in the future I'll
use it for change variable value but this time I have to change every 30
local variables to global variables.

If I need (and can) to write:

        name = nil
        sname = nil
        age = nil
        eval("name = 'Alice'")
        eval("sname = 'Smith'")
        eval("age = '19'")

better is to write just:

        name = 'Alice'
        sname = 'Smith'
        age = '19'

but the problem is I don't know the names of that variables for now, so I
need to make them parameters:

        names = someArrayWithVariableNamesProducer
        values = someArrayWithVariableValuesProducer
        names.each_with_index { |varName,i| 
            eval("#{varName} = #{values[i]}", MAIN_BINDING) 
        }  

So I think it is candidate for Ruby-Proposal :-) to make a additional
binding named i.e. "MAIN_BINDING" wich points current script...

:-)

-- 
Szymon Drejewicz