From: Brian Candler <b.candler@...>
Date: 2009-06-03T18:08:49+09:00
Subject: Re: block as string

Louis-Philippe wrote:
> any other idea?

Well, you can remember the string form at the time you define the 
lambda.

def fn(str)
  res = eval "lambda { #{str} }"
  class <<res; self; end.class_eval { define_method(:source) { str } }
  res
end

a = fn "|x| puts x+x"
a["Hello"]
puts a.source
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