From: "ako..." <akonsu@...>
Date: 2005-12-08T11:47:36+09:00
Subject: Re: code execution from file?

thank you very much for your help.

my application runs inside a web browser process, and creating a thread
does not seem scalable.

i tried to evaluate a file from inside a lambda and it seems to work. i
also was able to set safety level for lambda locally which effectively
restores $SAFE when lambda finishes. the only drawback of this was that
my environment is still visible from lambdas.

code = <<CODE
    v = MyClass.new('from text')
    v.mymethod
CODE

class MyClass
  def initialize(v) @v = v end
  def mymethod() puts "SAFE=#{$SAFE}, value=#{@v}" end
end

p = eval <<LAMBDA
    lambda {
    module Mod
    $SAFE = 3
    #{code}
    end
    }
LAMBDA

v = MyClass.new('original')
v.mymethod
p.call
v.mymethod