glucero/hash.rb

Created December 7, 2015 19:10

Star () You must be signed in to star a gist
Fork () You must be signed in to fork a gist

Learn more about clone URLs
Clone this repository at <script src="https://gist.github.com/glucero/5b8d4157758ce1fc819d.js"></script>
Save glucero/5b8d4157758ce1fc819d to your computer and use it in GitHub Desktop.

Download ZIP

Raw

hash.rb

	class Hash
	def to_proc
	method(:[]).to_proc
	end

	def dig(*keys)
	result = fetch(keys.shift, nil)

	if result.is_a?(Hash) && keys.any?
	result.dig *keys
	else
	result
	end
	end
	end

Author

glucero commented Dec 7, 2015

hash = {a: {b: {c: {d: {one: 1, two: 2, three: 3}}}}}

> %i[one three].map &hash.dig(*%i[a b c d])
=> [
    [0] 1,
    [1] 3
]

> %i[these keys do not exist].map &hash.dig(*%i[a b c d])
=> [
    [0] nil,
    [1] nil,
    [2] nil,
    [3] nil,
    [4] nil
]

> %i[one three].map &hash.dig(*%i[this branch does not exist])
=> [
    [0] nil,
    [1] nil
]

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment