[ruby-core:81881] [Ruby trunk Feature#13706] Allow CSV#delete to delete multiple columns or add #delete_columns method

From: vla-dy@...
Date: 2017-07-02 09:08:39 UTC
List: ruby-core #81881
Issue #13706 has been reported by wowinter13 (Vladislav Dyachenko).

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Feature #13706: Allow CSV#delete to delete multiple columns or add #delete_columns method
https://bugs.ruby-lang.org/issues/13706

* Author: wowinter13 (Vladislav Dyachenko)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
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I duplicated the main report message from this PR: https://github.com/ruby/csv/pull/4
The basic idea is that now we can delete only one column using #delete

`csv_table.delete("PassengerId")
csv_table.delete("Survived")
csv_table.delete("Name")
csv_table.to_csv`

The best working way for me to do it with multiple columns:
`
to_del = ["Name", "Ticket"]
csv_table = datus.by_col!.delete_if { |name, values| !to_del.include? name}`

But maybe it should work like this?
`
to_del = ["Name", "Ticket"]
data.delete(to_del)`




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