From: matthew@... Date: 2020-12-06T23:53:29+00:00 Subject: [ruby-core:101272] [Ruby master Feature#15975] Add Array#pluck Issue #15975 has been updated by phluid61 (Matthew Kerwin). Apologies for posting to a closed ticket, but here's a thought in case it helps someone propose something else in future: partial application in #to_proc , e.g. `games.map(&(:[], :steam_id))` I hate the syntax I just invented, but the idea of partial application to the right (i.e. applying args to a proc before applying the receiver) is interesting. ---------------------------------------- Feature #15975: Add Array#pluck https://bugs.ruby-lang.org/issues/15975#change-88952 * Author: lewispb (Lewis Buckley) * Status: Rejected * Priority: Normal ---------------------------------------- Inspired by https://github.com/rails/rails/issues/20339 While developing web applications I've often wanted to quickly extract an array of values from an array of hashes. With an array of objects, this is possible: ```rb irb(main):001:0> require 'ostruct' => true irb(main):002:0> [OpenStruct.new(name: "Lewis")].map(&:name) => ["Lewis"] ``` This PR adds Array#pluck allowing this: ```rb irb(main):001:0> [ {name: "Lewis"} ].pluck(:name) => ["Lewis"] ``` without this PR: ```rb irb(main):001:0> [ {name: "Lewis"} ].map { |item| item[:name] } => ["Lewis"] ``` Implemented here: https://github.com/ruby/ruby/pull/2263 -- https://bugs.ruby-lang.org/ Unsubscribe: