Change Hash keys from String to Symbol

Question

I need to change the keys of a Hash, I am currently given the key as a String and I need it to be the normal key of a hash. I leave the example below.

I have tried some methods that I found as Symbolize_keys, but they have not worked, says that the method does not exist and I use it as it is in Ruby's Apidock.

i have this:

hash = {"name"=>"Jhon","lastname"=>"Doe"}

and i need to convert This:

hash = {:name=>"Jhon",:lastname=>"Doe"}

Thanks Friends

I guess `symbolize_keys` is only available when working with Rails. The most known way to do it is `hash.map { |key, value| [key.to_sym, value] }.to_h` — Sebastián Palma, Dec 12 '17 at 13:58
Your question is unclear. Strings *are* perfectly normal keys of a hash. — Jörg W Mittag, Dec 12 '17 at 14:02
If you want to retrieve a value from a hash, you obviously need to use the same key you used to store it. — Jörg W Mittag, Dec 12 '17 at 14:18

Mark Thomas · Answer 1 · 2018-01-04T18:38:27.673

7

If you have Ruby 2.5:

hash.transform_keys!(&:to_sym)

edited Jan 04 '18 at 18:38

answered Dec 12 '17 at 14:16

Mark Thomas

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Thanks, i use 2.4.2. – Miguel Abdón Dec 12 '17 at 14:20
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ETA for Ruby 2.5 is 12/25, btw – Mark Thomas Dec 12 '17 at 14:40

Change Hash keys from String to Symbol

1 Answers1