From: "zverok (Victor Shepelev)" Date: 2022-01-24T22:40:05+00:00 Subject: [ruby-core:107271] [Ruby master Feature#18273] Class#subclasses Issue #18273 has been updated by zverok (Victor Shepelev). I see, and tend to agree���to some extent, at least! Not sure how much can be done here���some amount of "semantically not really clear, yet convenient" methods trickle from Rails/ActiveSupport. (My personal "favorite" is Array#intersect and related methods, making Array API pretending it is set instead of enhancing Set and making it more popular.) I could at least do this: https://github.com/ruby/ruby/pull/5480, WDYT? ---------------------------------------- Feature #18273: Class#subclasses https://bugs.ruby-lang.org/issues/18273#change-96131 * Author: byroot (Jean Boussier) * Status: Closed * Priority: Normal ---------------------------------------- Ref: https://github.com/rails/rails/pull/43481 Something we forgot to mention in [Feature #14394], is either a parameter or another method to only get direct descendants. Active Support has been offering `Class.subclasses` as: ```ruby def subclasses descendants.select { |descendant| descendant.superclass == self } end ``` It seems a bit silly to grab all descendants and then restrict the list when `Class#descendants` had to do some recursion to get them all in the first place. ### Proposal We could either implement `Class#subclasses` directly, or accept a parameter in `Class#descendants`, e.g. `descendants(immediate = false)`. cc @eregon -- https://bugs.ruby-lang.org/ Unsubscribe: