From: James Edward Gray II <james@...>
Date: 2010-03-31T23:39:57+09:00
Subject: Re: uninitialized constant CSV::Reader

On Mar 31, 2010, at 9:29 AM, Nathan Sharkey wrote:

> Brian Candler wrote:
>> Nathan Sharkey wrote:
>> 
>>> require 'csv'
>>> 
>>> CSV::Reader.parse(File.open('stuff.csv', 'rb')) do |row|
>> ...
>>> NameError: uninitialized constant CSV::Reader
>> ...
>>> any ideas??
>> 
>> Perhaps you have another file called csv.rb which is earlier in your 
>> $LOAD_PATH
>> 
>> (If your own program is called csv.rb, that would the the culprit :-)
>> 
>> In any case, you'd probably be better off with the fastercsv gem.
> 
> Hi, thanks for response,  Fastercsv actually quits with the following 
> notice which made me try CSV::Reader in the first place :-)
> 
> "Please switch to Ruby 1.9's standard CSV library.  It's FasterCSV plus
> support for Ruby 1.9's m17n encoding engine."
> 
> I havn't created any csv.rb file and I'll check loadpath but I would be 
> happy to use FasterCSV if anyone can suggest how i do this given the 
> above notice.

You don't want to be using it.  That's why I put the error there.  :)

The CSV library in Ruby 1.9 is literally the FasterCSV code.  The reason it's preferable though is that it has been enhanced to handle Ruby 1.9-isms, like m17n.  That's why you need to switch over.

CSV::Reader is something from Ruby 1.8's version of CSV (before it was replaced by the FasterCSV code).  You can't use that anymore with 1.9.  Instead, you should mostly just be able to replace FasterCSV (or FSCV) with CSV in your code and it will work fine.

Does that make sense?

James Edward Gray II