From: ruby-core@... Date: 2017-11-28T04:26:45+00:00 Subject: [ruby-core:83904] [Ruby trunk Feature#11286] [PATCH] Add case equality arity to Enumerable's sequence predicates. Issue #11286 has been updated by marcandre (Marc-Andre Lafortune). matz (Yukihiro Matsumoto) wrote: > I am positive about the idea too. But as a duty of the final decision maker, I have to consider every option before the judgment. I see a few additional options. > > * takes optional argument that takes `===` (proposed) > * takes optional keyword argument, `match:` for example > * introduces another set of methods with different names > > Right now, I am wandering between option 1 and 2. I hope a decision is made on this. While I love keyword arguments in general, I am not convinced they are needed here and I would favor solution #1. ---------------------------------------- Feature #11286: [PATCH] Add case equality arity to Enumerable's sequence predicates. https://bugs.ruby-lang.org/issues/11286#change-67954 * Author: 0x0dea (D.E. Akers) * Status: Open * Priority: Normal * Assignee: matz (Yukihiro Matsumoto) * Target version: ---------------------------------------- ## Proposal It is proposed that `Enumerable`'s sequence predicates (`#all?`, `#any?`, `#none?`, and `#one?`) be augmented to return, in the case of a single argument, whether their query holds when each element is supplied to the argument's `#===` method. ## Rationale `Enumerable#grep` filters by case equality, allowing us to write very natural and expressive code: ```ruby strs.select { |str| /foo/ === str } strs.grep(/foo/) nums.select { |num| (5..10) === num } nums.grep(5..10) ``` In addition to taking advantage of the versatility of case equality, it lets us do away with the syntactic noise incurred by opening a block. `#grep` is a very nice method! Let's make `#all?` and friends more like `#grep`. ---Files-------------------------------- 0001-enum.c-add-case-equality-arity-to-sequence-predicates.patch (10 KB) case_equality_sequence_predicates-check_argc_before_deref.patch (10 KB) case_equality_sequence_predicates-all_updates.patch (9.94 KB) -- https://bugs.ruby-lang.org/ Unsubscribe: