👀 Views: 0 💬 Answers: 1 📅 Created: 2025-06-16

ruby recursion hash

I've tried everything I can think of but I tried several approaches but none seem to work. I tried several approaches but none seem to work... I'm working with a frustrating scenario while trying to transform a nested hash structure in Ruby 3.1 using a recursive method. My goal is to convert all keys in the hash to uppercase. However, when I run my code, I receive a 'stack level too deep' behavior. Here’s the method I’ve written: ```ruby def transform_keys_to_uppercase(obj) if obj.is_a?(Hash) obj.each_with_object({}) do |(key, value), result| result[key.to_s.upcase] = transform_keys_to_uppercase(value) end elsif obj.is_a?(Array) obj.map { |item| transform_keys_to_uppercase(item) } else obj end end ``` When I call this method with the following nested hash: ```ruby nested_hash = { name: 'John', details: { age: 30, address: { city: 'New York', zip: '10001' } }, hobbies: ['reading', 'travelling'] } ``` I invoke the method like this: ```ruby result = transform_keys_to_uppercase(nested_hash) puts result.inspect ``` However, instead of getting the transformed hash, I get the behavior: ``` stack level too deep ``` I've tried debugging by adding some print statements inside the method to see how the recursion flows, but I still can’t pinpoint the scenario. This behavior seems tied to how Ruby handles recursion. Is there something I'm missing that could lead to this infinite recursion? Any advice on how to resolve this would be greatly appreciated! How should I modify my approach to avoid this behavior? I'm working on a API that needs to handle this. What's the best practice here? For reference, this is a production desktop app. Thanks in advance!