[ruby-core:27993] Re: [Bug:trunk] some behavior changes of lib/csv.rb between 1.8 and 1.9

On Feb 1, 2010, at 6:35 AM, NAKAMURA, Hiroshi wrote:

> Hi jeg2,
> 
> On Fri, Jan 29, 2010 at 02:13, James Edward Gray II
> <[e-mail]> wrote:
>>> 3) CSV.parse
>>> 
>>> $ ruby18 -rcsv -ve 'p CSV.parse "\nfoo"'
>>> [[nil], ["foo"]]
>>> 
>>> $ ruby19 -rcsv -ve 'p CSV.parse "\nfoo"'
>>> [[], ["foo"]]
>> 
>> Yeah, the old CSV included some seemingly random nils in places.  FasterCSV "corrects" this odd behavior.
> 
> Please let me know what you think 'random'.
> 
> 0% ruby18 -rcsv -e 'p ["", ",", ",,"].map { |c| CSV.parse_line(c) }'
> [[nil], [nil, nil], [nil, nil, nil]]
> 0% ruby19 -rcsv -e 'p ["", ",", ",,"].map { |c| CSV.parse_line(c) }'
> [nil, [nil, nil], [nil, nil, nil]]

I just meant that I didn't understand how "" becomes [nil].  There's no data to read, so I don't get why we think there is a nil field.

James Edward Gray II