From: shevegen@... Date: 2019-11-04T21:32:40+00:00 Subject: [ruby-core:95679] [Ruby master Feature#15323] [PATCH] Proposal: Add Enumerable#filter_map Issue #15323 has been updated by shevegen (Robert A. Heiler). Jonathan recently added this to the upcoming developer discussion (at https://bugs.ruby-lang.org/issues/16262), in regards as to whether the current behaviour is correct, or whether it should include non-nil values as well. The question is whether the behaviour should be like Array#compact or not. I can not say much about Array#compact, but from the name filter_map alone, I would assume that first a filter is used (as a "positive" .select), and then the .map is applied. If this reasoning makes any sense to anyone else, then I believe that the behaviour shown by .filter_map as-is is correct and should be retained. But this is just my opinion - my reasoning comes primarily from the name itself (.filter_map that is). ---------------------------------------- Feature #15323: [PATCH] Proposal: Add Enumerable#filter_map https://bugs.ruby-lang.org/issues/15323#change-82466 * 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: