From: Thomas Hafner <thomas@...>
Date: 2008-05-01T16:30:04+09:00
Subject: limiting the scope of a variable

Hello,

with a function like that

  def let(*a)
    yield(*a)
  end

the scope of variables can be limited, e.g. like this:

  let {
    x = "foo"
    # ... do something with x ...
    # here's the end of scope of x
  }
  # ...
  let {
    x = "bar" # this is another, different x
    # ... do something with x ...
  }

Is there already a standard means working like this? If it's a
standard library function, what's its name?

Regards
  Thomas