From: nobu@... Date: 2016-04-14T07:21:28+00:00 Subject: [ruby-core:74948] [Ruby trunk Feature#12282] Hash#dig! for repeated applications of Hash#fetch Issue #12282 has been updated by Nobuyoshi Nakada. Description updated I'm negative because: 1. This example is wrong. ~~~ruby places.dig :countries, :canada, :ontario # => nil ~~~ It raises a `TypeError`. 2. It feels curious to me that the method with '!' raises an exception whereas the method without '!' doesn't. ---------------------------------------- Feature #12282: Hash#dig! for repeated applications of Hash#fetch https://bugs.ruby-lang.org/issues/12282#change-58076 * Author: Robb Shecter * Status: Open * Priority: Normal * Assignee: ---------------------------------------- A new feature for your consideration: #dig! which is to #fetch as #dig is to #[]. For me and maybe many others, Hash#fetch is used much more than Hash#[]. And traversing multiple fetches isn't very convenient nor Ruby-like, e.g.: places.fetch(:countries).fetch(:canada).fetch(ontario). Here's how it would work: ~~~ruby places = { countries: { canada: true } } places.dig :countries, :canada # => true places.dig! :countries, :canada # => true places.dig :countries, :canada, :ontario # => nil places.dig! :countries, :canada, :ontario # => KeyError: Key not found: :ontario ~~~ Here's an implementation and tests: https://gist.github.com/dogweather/819ccdb41c9db0514c163cfdb1c528e2 -- https://bugs.ruby-lang.org/ Unsubscribe: <mailto:ruby-core-request@ruby-lang.org?subject=unsubscribe> <http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>