check if hash keys exist in ruby

Asked Sep 21 '16 at 09:40

Active Sep 21 '16 at 09:40

Viewed 58 times

I have a big hash and I know that I almost always can get the data I need from hash['info'][1]['summary_result']['gsb']. But from time to time these keys may not exist. To avoid an error I use rescue like this:

begin
  return hash['info'][1]['summary_result']['gsb']
rescue Exception
  return nil
end

Are there any shorter methods to do it?

asked Sep 21 '16 at 09:40

enjaku

1

__Don't__ rescue `Exception`. Always use a more specific class. – Sergio Tulentsev Sep 21 '16 at 09:43
I use ruby 2.1, there is no method `dig`. – enjaku Sep 21 '16 at 09:53
In this case, you can steal [implementation from Rubinius](https://github.com/rubinius/rubinius/blob/master/core/hash.rb#L534-L541). – Sergio Tulentsev Sep 21 '16 at 09:58

check if hash keys exist in ruby

0 Answers0