From: Gavin Kistner <gavin@...>
Date: 2005-04-19T10:25:12+09:00
Subject: Re: Store erb block and alter scope of erb block eval?

On Apr 18, 2005, at 3:54 PM, Steve V wrote:
> 1) How can I store an erb block captured using do for later use? 
> Regular
> variable assignment doesn't appear to work.

Works for me:

class Foo
    def set_block( &block ); @meth = block; end
    def call_block( *args ); @meth.call( *args ); end
end

f = Foo.new
f.set_block { |x,y| p x,y }
f.call_block 3,4
#=>3
#=>4


> 2) When evaluating 'block', how can I get it to use the variables 
> present
> within the scope of the calling function, or at least within the 
> calling
> class?

require 'erb'

class Foo
	def rhtml=( str )
		@rhtml = ERB.new( str )
	end
	def run1
		localvar = 'run1'
		@rhtml.result( binding )
	end
	def run2
		localvar = 'run2'
		@rhtml.result( binding )
	end
end

f = Foo.new
f.rhtml = '<p><%= localvar %></p>'
p f.run1
#=> "<p>run1</p>"
p f.run2
#=> "<p>run2</p>"