From: Roger Pack <rogerpack2005@...>
Date: 2007-08-15T04:23:29+09:00
Subject: Re: TCPSocket select method

Eric Hodel wrote:
> On Aug 13, 2007, at 23:54, Sylvain Joyeux wrote:
> 
>>> chance what the 'internal' select method does?
>> It cannot use IO.select since IO.select is a singleton method of IO  
>> and a
>> TCPSocket object is an instance of IO. The only way to explicitely get
>> IO.select is to call
>>   r,w,e = IO.select(...)
>>
>> It calls Kernel#select. And I wouldn't be surprised if  
>> Kernel#select and
>> IO.select were actually the same method ...
> 
> They are.

 class TCPSocket
  def readableNow?
    r,w,e = select([self],nil,nil,0)
    return r != nil
  end
 end

So...follow up question:
with the above code, if you try to run it, it says that "select takes 0 
arguments, 4 given" (whereas 'normally' select takes four).  If I 
replace the call to select (above), with IO.select, then it works with 4 
parameters.  So I am thinking it is a different 'internal' select 
function of some type.  So...my guess is it is not a call to IO.select 
or Kernel.select...hmm...
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