From: Stefan Codrescu <ssmmcc1@...>
Date: 2012-07-25T14:56:06+09:00
Subject: Re: String interpolation / hash of local variables

Try this:


z = 1
y = 2
hash = Hash.new
local_variables.each do |var|
	hash[var] = eval var
end
puts h

That should give you a hash of the local variables.


On Jul 24, 2012, at 9:08 PM, Gerbeck Shark wrote:

> Hello all-
> 
> I'm trying to do something likes
> 
> Demonstration Ruby/logic
> 
> -------
> template = <<-HTML
> <div>%{example}</div>
>  ...
> <div>%{foobar}</div>
> HTML
> 
> for i in special_list
>     example = ....
>     foobar = ...
>     arr.push template % return_magical_hash_with_local_variables()
> -------
> 
> in Python there is a locals() function that returns a dictionary/hash of
> local variables.
> 
> In Ruby I've found local_variables() but that does not provide the
> values. It should for just the example above! Or perhaps I can be
> enlightened by someone here?
> 
> The other, dirtier idea is something like this:
> 
> -------
> template = %q{
> <div>#{example}</div>
>  ...
> <div>%{foobar}</div>
> }
> 
> for i in special_list
>     example = ....
>     foobar = ...
>     arr.push eval("\"template\"")
> -------
> 
> I believe one should avoid calling eval as much as possible. I tried the
> "Facets" package,
> "String.interpolate{template}" calls eval, it just masks the fact.
> 
> This could be avoided if there were a function that return a dictionary
> or hash of local variables.
> 
> -- 
> Posted via http://www.ruby-forum.com/.
>