From: tonysunnymails@... Date: 2018-11-20T14:29:55+00:00 Subject: [ruby-core:89908] [Ruby trunk Feature#15323] [PATCH] Proposal: Add Enumerable#filter_map Issue #15323 has been updated by tny (Tony Sunny). Could't we use reduce for this? ~~~ ruby (1..10).reduce([]) { |a, i| i.even? ? a << i : a } ~~~ ---------------------------------------- Feature #15323: [PATCH] Proposal: Add Enumerable#filter_map https://bugs.ruby-lang.org/issues/15323#change-74990 * Author: alfonsojimenez (Alfonso Jim��nez) * Status: Open * Priority: Normal * Assignee: * Target version: ---------------------------------------- This is a proposal for a combined `filter` + `map` method (https://bugs.ruby-lang.org/issues/5663). This method both filters and maps the elements of an enumerable in just one iteration: ~~~ ruby (1..10).filter_map { |i| i * 2 if i.even? } #=> [4, 8, 12, 16, 20] ~~~ GitHub PR: https://github.com/ruby/ruby/pull/2017 ---Files-------------------------------- 0001-Adding-Enumerable-filter_map.patch (4.61 KB) -- https://bugs.ruby-lang.org/ Unsubscribe: