From: Josh Cheek <josh.cheek@...>
Date: 2010-10-23T16:12:23+09:00
Subject: Re: Why no yield in 1.9.2 blocks?

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On Fri, Oct 22, 2010 at 3:09 PM, Ed Howland <ed.howland@gmail.com> wrote:

> Hi,
>
> I searched in vain for the answer, but why doesn't yield work inside
> Ruby 192 blocks. The syntax allows you to pass the blocks as a &blk
> param, but you have to call the block with blk.call. If you try to use
> yield, you get a LocalJumpError:
>
>

I always figured it was because it was enclosing its environment, and having
yield in the block and the environment could bet ambiguous.


def sort_proxy(collection)
  collection.sort! do |a,b|
    yield a , b # yield in a block
  end
end

ary = [4,2,9,3,1]

sort_proxy ary do |a,b|
  a <=> b
end

ary # => [1, 2, 3, 4, 9]

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