Safe navigation equivalent to Rails try for hashes

Question

In Rails, you can do hash.try(:[], :key) which helps if hash is potentially nil. Is there an equivalent version for using the new Ruby 2.3

Answer 1

Accepted answer will not account for when hash is nil...

You can rewrite what you have using the safe nav operator before the .try and that will work

hash&.try(:[], :key)

but you can also use:

http://ruby-doc.org/core-2.3.0_preview1/Hash.html#method-i-dig

A way you could do this on a hash is by doing...

hash&.dig(:key1, :key2 ...)

which will return nil if any key fetch isn't present.

{ key1: { key2: 'info' } } 

would return 'info'

{ key1: { wrong_key: 'info' } } 

would return nil