From: dblack@...
Date: 2002-10-09T13:09:26+09:00
Subject: Re: reproducable bug

Hi --

On Wed, 9 Oct 2002, HelloTree, Inc. wrote:

> Hello,
>
> So here's the code:
>
> ----- BEGIN CODE -----
>
> require 'socket'
>
> ...
>
> sock = TCPSocket.new (SERVER_ADDRESS, SERVER_PORT)
>
> a = 'a'
> a[0..0] = ''
> sock.puts(String.new(a))  #  CRASH!
>
> puts 'We never get here.'

String.new wants a string (literal or otherwise) as its argument.
a is an Array, so it doesn't work:

  irb(main):003:0> a = [0..0]
  [0..0]
  irb(main):004:0> puts String.new(a)
  TypeError: failed to convert Array into String
	  from (irb):4:in `initialize'
	  from (irb):4:in `new'
	  from (irb):4

This is a case where, if you wanted, you could use #to_str, which
is called in cases where objects need to masquerade as strings:

  irb(main):005:0> def a.to_str; to_s; end
  nil
  irb(main):006:0> puts String.new(a)
  0..0

Or you could just do:

  puts String.new(a.to_s)


David

-- 
David Alan Black                      | Register for RubyConf 2002!
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