From: "ara.t.howard" <ara.t.howard@...>
Date: 2008-04-16T13:10:44+09:00
Subject: Re: Parallel for loop


On Apr 15, 2008, at 9:35 PM, Fredrik wrote:
> But there isn't, right?


cfp:~ > cat a.rb
module Enumerable
   def forkify &b
     map do |*a|
       r, w = IO.pipe
       fork do
         r.close
         w.write( Marshal.dump( b.call(*a) ) )
       end
       [ w.close, r ].last
     end.map{|r| Marshal.load [ r.read, r.close ].first}
   end
end


result =
   [0, 1, 2, 3].forkify do |i|
     p [ Process.ppid, Process.pid ]
     i ** 2
   end

p result





cfp:~ > ruby a.rb
[80870, 80871]
[80870, 80872]
[80870, 80873]
[80870, 80874]
[0, 1, 4, 9]


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