From: "headius (Charles Nutter)" <headius@...>
Date: 2012-11-27T01:49:06+09:00
Subject: [ruby-core:50171] [ruby-trunk - Bug #7440] IO#lines etc. should return Array


Issue #7440 has been updated by headius (Charles Nutter).


Is this really wnat you'd want? ARGF and IO (and possibly Zlib's readers) can stream data lazily in lines/chars/bytes/codepoints, where forcing them to an Array would have to eagerly read everything (and potentially block).

irb(main):001:0> io = File.open('Makefile')
=> #<File:Makefile>
irb(main):002:0> lines = io.lines
=> #<Enumerator: #<File:Makefile>:lines>
irb(main):003:0> lines.next
=> "SHELL = /bin/sh\n"
irb(main):004:0> io.pos
=> 16
irb(main):005:0> lines.next
=> "NULLCMD = :\n"
irb(main):006:0> io.pos
=> 28
irb(main):007:0> lines.to_a; nil
=> nil
irb(main):008:0> io.pos
=> 12737

----------------------------------------
Bug #7440: IO#lines etc. should return Array
https://bugs.ruby-lang.org/issues/7440#change-33970

Author: yhara (Yutaka HARA)
Status: Open
Priority: Normal
Assignee: yhara (Yutaka HARA)
Category: core
Target version: 2.0.0
ruby -v: ruby 2.0.0dev (2012-11-26 trunk 36708) [x86_64-darwin12.2.1] 


String#bytes, #chars, #codepints and #lines are changed to return Array in #6670.

For consistent behavior, following methods should return Array too:

* ARGF.lines, chars, bytes, codepoints
* IO#lines, chars, bytes, codepoints
* StringIO#lines, chars, bytes, codepoints
* Zlib::GzipReader#lines, bytes

Please let me know if there are more.


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