From: oleynikov@...
Date: 2018-12-14T20:22:36+00:00
Subject: [ruby-core:90532] Re: [Ruby trunk Feature#15323] [PATCH] Proposal:	Add Enumerable#filter_map

nardonykolyszyn@gmail.com wrote:
> (1..10).map { |e| e.even? ? (e * 2) : e }

Yeah, but without `#filter` this is still an array with 10 elements.

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