From: "Hanmac (Hans Mackowiak)" <hanmac@...>
Date: 2013-10-04T02:13:27+09:00
Subject: [ruby-core:57643] [ruby-trunk - Bug #8929] CSV.foreach(filename)	without block returns failing Enumerator


Issue #8929 has been updated by Hanmac (Hans Mackowiak).


another sample where the difference is shown:

CSV.foreach('test.csv').with_index { |csv,i| p i } #<< fails
CSV.to_enum(:foreach,'test.csv').with_index { |csv,i| p i } # works


i think the code from jwillie would be nearly the best, but i would use this:

return to_enum(__method__, path, options) unless block_given?

----------------------------------------
Bug #8929: CSV.foreach(filename) without block returns failing Enumerator
https://bugs.ruby-lang.org/issues/8929#change-42259

Author: martinjos (Martin Sidaway)
Status: Feedback
Priority: Normal
Assignee: JEG2 (James Gray)
Category: lib
Target version: 
ruby -v: 2.0.0-p247
Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN


CSV.foreach(filename) {|entry| p entry }  => works
CSV.foreach(filename).to_a                => fails

It gives the following error:

IOError: closed stream
	from /home/martin/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/csv.rb:1776:in `gets'
	from /home/martin/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/csv.rb:1776:in `block in shift'
	from /home/martin/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/csv.rb:1774:in `loop'
	from /home/martin/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/csv.rb:1774:in `shift'
	from /home/martin/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/csv.rb:1716:in `each'
	from (irb):7:in `each'
	from (irb):7:in `to_a'
        (...)



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