From: shugo@... Date: 2019-02-13T02:41:40+00:00 Subject: [ruby-core:91524] [Ruby trunk Feature#15323] [PATCH] Proposal: Add Enumerable#filter_map Issue #15323 has been updated by shugo (Shugo Maeda). +1 for filter_map. Matz agreed the feature itself before: https://bugs.ruby-lang.org/issues/5663#note-42 The name filter_map is good because other languages have similar names (e.g., filter-map in Scheme). ---------------------------------------- Feature #15323: [PATCH] Proposal: Add Enumerable#filter_map https://bugs.ruby-lang.org/issues/15323#change-76785 * 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: