From: Yukihiro Matsumoto <matz@...>
Date: 2012-02-14T09:17:27+09:00
Subject: [ruby-core:42578] Re: [ruby-trunk - Feature #4890] Enumerable#lazy

Hi,

In message "Re: [ruby-core:42556] [ruby-trunk - Feature #4890] Enumerable#lazy"
    on Tue, 14 Feb 2012 00:36:10 +0900, Thomas Sawyer <transfire@gmail.com> writes:

|Actually, is there any reason why Enumerator's usual methods themselves aren't lazy? Is it necessary to have both? If they were lazy then the notation would be pretty simple:
|
|  [1,2,3].each.select{ |e| ... }.map{ |e| .... }.to_a
|
|No special method needed, as #each would do the job.

Compatibility.  I don't want to break tons of programs that expect
arrays without calling to_a.

							matz.