From: dawid.janczak@...
Date: 2014-07-07T13:03:45+00:00
Subject: [ruby-core:63582] [ruby-trunk - Bug #10013] [Open] [CSV] Yielding all elements from a row

Issue #10013 has been reported by Dawid Janczak.

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Bug #10013: [CSV] Yielding all elements from a row
https://bugs.ruby-lang.org/issues/10013

* Author: Dawid Janczak
* Status: Open
* Priority: Normal
* Assignee: 
* Category: 
* Target version: 
* ruby -v: ruby 2.2.0dev (2014-07-06 trunk 46722) [x86_64-linux]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN
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Let's say I have the following CSV file:
col1,col2,col3
1,2,3
4,5,6
(...)

I want to iterate over values yielding them to a block. I can do that like this:
`CSV.foreach('file.csv') { |col1, col2, col3| print col2 + " " } # => "col2 2 5"`
This works fine, but I would like to skip the headers:
`CSV.foreach('file.csv', headers: true) { |col1, col2, col3| print col2 + " " } # => NoMethodError`

CSV yields rows as arrays if headers option is not specified and destructuring works fine.
When headers option is specified however, CSV::Row objects are yielded instead and destructuring fails.

It would be nice to have both scenarios working in the same manner, but I don't know how to approach this. Calling to_a on yielded row (https://github.com/ruby/ruby/blob/trunk/lib/csv.rb#L1731) worked, but obviously this would break when people actually expect CSV::Row instance. Any ideas?



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