From: kachick1@...
Date: 2019-06-14T03:40:26+00:00
Subject: [ruby-core:93128] [Ruby trunk Feature#15922]	Enumerable#partition(pattern)

Issue #15922 has been reported by kachick (Kenichi Kamiya).

----------------------------------------
Feature #15922: Enumerable#partition(pattern)
https://bugs.ruby-lang.org/issues/15922

* Author: kachick (Kenichi Kamiya)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
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* `any?` `all?` `one?` `none?` already can take pattern argument. ref: https://bugs.ruby-lang.org/issues/11286
* `select` `reject` is proposed to take pattern argument. ref: https://bugs.ruby-lang.org/issues/14197

I would like to use `partition` with pattern argument for consistency.


```ruby
module Enumerable
  alias_method :original_partition, :partition

  def partition(*args, &block)
    case args.size
    when 1
      pattern = args.first
      original_partition do |element|
        pattern === element
      end
    when 0
      original_partition(&block)
    else
      raise ArgumentError
    end
  end
end

[1, 2, 3.3, 4, 5.5].partition(Integer)
#=> => [[1, 2, 4], [3.3, 5.5]]
```



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