From: "Simon Kröger" <SimonKroeger@...>
Date: 2005-09-03T08:02:59+09:00
Subject: Re: Idiomatic conversion of yielding block to array

Jacob Fugal wrote:

> Good heavens, no! Neither of those are thread safe. Criminy!
> 
> Why not something simple like so:
> 
> require 'enumerator'
> 
> def compare_by_line( expected, actual, message )
>   expected_lines = expected.to_enum(:each_line)
>   actual_lines = actual.to_enum(:each_line)
>   expected_lines.zip(actual_lines).each_with_index do |pair, index|
>     assert_equal( *pair, "#{message} on line #{index + 1}")
>   end
> end
> 
> compare_by_line( @html_reference, cal.to_html, "Calendar.to_html incorrect" )

because zip converts each argument to an array, which isn't what you 
want if there are many lines.

> There's no need for threads...

True SyncEnumerator does it with continuations but i wasn't ready for 
this mind bending stuff (yet). (and now i don't need to make knots in my 
brain, because Levin was so nice to tell us about SyncEnumerator)

But what exactly isn't thread safe? SizedQueue is.

> Jacob Fugal

Threads aren't evil.

cheers

Simon