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Feature #12282

Updated by nobu (Nobuyoshi Nakada) about 3 years ago

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

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