From: Robert Klemme <shortcutter@...>
Date: 2009-10-09T01:04:24+09:00
Subject: Mixing instance_eval and block with arguments

Hi,

here's what I'd like to do in a silly example:

S = Struct.new :foo, :bar

init = lambda do |a, b|
  self.foo = b
  self.bar = a + 10
end

s = S.new # or create an instance otherwise

# now comes the fun part which does not work
s.instance_eval(1, 2, &init)
=> #<struct S foo=2, bar=11>

In other words: I like to define a block as an initializer which I can
store away somewhere and invoke that initializer later on in the
context of "self" and pass arguments at the same time.  Any ideas how
I can accomplish this elegantly?

Kind regards

robert

-- 
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