From: "yhara (Yutaka HARA)" <redmine@...>
Date: 2012-10-25T17:48:28+09:00
Subject: [ruby-core:48242] [ruby-trunk - Feature #6240] Enumerable#drop with negative argument


Issue #6240 has been updated by yhara (Yutaka HARA).

Target version changed from 2.0.0 to next minor


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Feature #6240: Enumerable#drop with negative argument
https://bugs.ruby-lang.org/issues/6240#change-31517

Author: marcandre (Marc-Andre Lafortune)
Status: Assigned
Priority: Normal
Assignee: matz (Yukihiro Matsumoto)
Category: core
Target version: next minor


Currently, Enumerable#drop works only for non-negative arguments.

It could be extended so that negative arguments means dropping from the end:

    [:hello, :world].drop(-1) # => [:hello]

This could especially be interesting for `Lazy#drop`, which would keep a circular buffer of elements before yielding them.

    (1..6).lazy.drop(-3).each{|x| puts x} # -> prints 1, 2 and 3

Thoughts?


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