From: Brad Hilton <bhilton@...>
Date: 2004-03-30T10:30:18+09:00
Subject: Re: calling break in proc

nobu.nokada@softhome.net wrote:
> Hi,
> 
> At Tue, 30 Mar 2004 04:02:54 +0900,
> Brad Hilton wrote in [ruby-talk:96055]:
> 
>>The code works with ruby 1.8.1, but not with 1.8-cvs or 1.9.
> 
> 
> And works with latest 1.8 and 1.9 in cvs.
> 

My app is still raising an error, so I've simplified things as much as 
possible with a test script.  The original example I provided does now 
work with the latest cvs, but the following does not:

----------------------------------
class DelayedFetcher
   def initialize(&block)
     @block = block
     @rows = nil
   end

   def load_data
     return if @rows
     @rows = []
     @block.call(proc { |hash| @rows << hash })
   end # load_data

   def call
     load_data
     @rows.each { |row|
       yield(row)
     }
   end
end # DelayedFetcher

# create an object that lazily loads some data
obj = DelayedFetcher.new { |block|
   10.times do |i|
     block.call({ 'i' => i })
   end
}

data_handler = proc { |hash|
   p hash
   break if hash['i'] == 5
}

obj.call(&data_handler)

---------------------------------

I hope this helps to track down the problem.

Thanks,
Brad