From: Martin DeMello <martindemello@...>
Date: 2006-02-07T18:58:20+09:00
Subject: lazy evaluation?

Could someone explain why this code works:

    def repeat(condition)
      puts "condition: #{condition}"
      yield
      retry if not condition
    end

    j=0
    repeat (j >= 10) do
     puts j
     j+=1
    end

    puts "after loop, j = #{j}"

I'd have expected repeat (j >= 10) to pass "false" into the method,
which would then yield repeatedly to the do/end block, never seeing the
(condition) part again.

martin