From: Oleg Puchinin <redmine@...>
Date: 2008-12-27T20:30:42+09:00
Subject: [ruby-core:20917] [Feature #936] IO.nread function

Feature #936: IO.nread function
http://redmine.ruby-lang.org/issues/show/936

Author: Oleg Puchinin
Status: Open, Priority: Normal

USAGE:
  require 'socket'
     s1 = UDPSocket.new
     s1.bind("127.0.0.1", 0)
     s2 = UDPSocket.new
     s2.bind("127.0.0.1", 0)

     s2.connect(*s1.addr.values_at(3,1))
     s1.connect(*s2.addr.values_at(3,1))
     s1.send "aasdfsadfwasdfasdaa", 0     
     IO.select([s2]) # emulate blocking recvfrom

     # !!!!!!!!!!!!!!!!
     p s2.recvfrom_nonblock(s2.nread)  #=> ["aaa", ["AF_INET", 33302, "localhost.localdomain", "127.0.0.1"]]
     # !!!!!!!!!!!!!!!!


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