From: Ge Bro <boomstik@...>
Date: 2007-11-25T05:04:22+09:00
Subject: Re: Iterating through class names using a block

Ge Bro wrote:
> Great, so with everyone's help this is what I ended up doing in the end:
> 
> foo = [1foo, 2foo, 3foo]
> bar = [abar, bbar]
> 
> ['foo', 'bar'].each do |this_array|
>    length = 0
>    this_obj = this_array.to_s.capitalize.constantize
>    until length == eval(this_array).length
>      this_obj.create(:word => eval(this_array)[length])
>      length += 1
>    end
> 
> the trick was to use the .constantize method to turn 'foo' and 'bar' 
> into classes Foo and Bar, and then to use eval() to use the array's 
> names instead of its contents.
> 
> I came across .constantize after searching for const_get as phrogz 
> suggested.
> 
> 7stud, my classes are defined in their corresponding controllers - this 
> is a part of a Rails exercise
> 
> dusty, your method using collect and compact looks interesting, I'll 
> play with it too.
> 
> Thanks everyone for help. I haven't been excited about programming for 
> the last 15 years, but Ruby is changing that rapidly :)


btw, i do have to admit that i have no clear idea of why eval() works 
here and what it's actually supposed to do. Just reading about it now 
and trying to make sense of it.
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