From: eregontp@... Date: 2019-10-06T19:22:57+00:00 Subject: [ruby-core:95249] [Ruby master Feature#15323] [PATCH] Proposal: Add Enumerable#filter_map Issue #15323 has been updated by Eregon (Benoit Daloze). Isn't `enum.filter_map { |e| ... }` supposed to be (according to the name) the same as `enum.map { |e| ... }.filter { |e| e }`? I'm not completely sure what is better, but to me it sounds surprising that a method with `filter` in its name filters differently than `Enumerable#filter` (which removes both false and nil values). ---------------------------------------- Feature #15323: [PATCH] Proposal: Add Enumerable#filter_map https://bugs.ruby-lang.org/issues/15323#change-81926 * Author: alfonsojimenez (Alfonso Jim�nez) * Status: Closed * 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: