From: "robertgleeson (Robert Gleeson)" <redmine@...>
Date: 2013-07-25T10:44:08+09:00
Subject: [ruby-core:56165] [ruby-trunk - Feature #8683] CSV library can't append to the current row. It should be able to.


Issue #8683 has been updated by robertgleeson (Robert Gleeson).


@nobu Thanks! I've re-created an example using CSV::Table:
require "csv"
row = CSV::Row.new ["Name"], ["Name"], true
table = CSV::Table.new [row]
table[0] << ["Hair Color", "Hair Color"]
p table.to_csv


It works like I want, but CSV::Row has a strange API. Why does it have a concept of a header, and try to 
map it to a value, as if it were a Hash? Couldn't it just be a row of values with no header? And if it is being
treated like a Hash, why isn't the argument just :header => :value?  instead of [:header], [:value] ? It looks
like it even has a method called field(), which may as well be Hash#fetch.

This isn't a bug anymore, but I am curious why it works like that. My problem is solved, so thanks again.
----------------------------------------
Feature #8683: CSV library can't append to the current row. It should be able to.
https://bugs.ruby-lang.org/issues/8683#change-40658

Author: robertgleeson (Robert Gleeson)
Status: Rejected
Priority: Normal
Assignee: 
Category: 
Target version: 


The CSV library can only add *new* rows, and it provides no way to update the current row after it has been created.

For example:
CSV.generate headers: true do |csv| 
  csv << ["one"]
  
  ["two", "three"].each do |e| 
    csv << e # This creates a new row, I want to append.
  end
  csv.headers << ["two", "three"] # No, this doesn't work either.
end

Is this possible? I find it hard to believe the API could be _that_ limited and inflexible. 



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