Question

I have a hash with an arbitrary key:

{'GET': [1,2,3]}

or

{'POST': ['my data 0', 'my data 1']}

The hash is generated from JSON which is sent in the request body. There is just one key, or rather, I ignore any keys but one.

I want to find which key it is, and this is the code that I wrote:

items = data['GET'] || data['get'] || data['POST'] || data['post']

this does not look neat. If the number of keys that I want to process grows the expression will be long. I want it to be short. I am new to Ruby, is there a better way?

Answer 1

If you think it might grow, you may want to separate the HTTP methods from the finding of that method in the data:

methods = [:get, :post]

def find_method(data)
  keys = methods.map{|m| [m.to_s.upcase, m.to_s]}.flatten
  data.values_at(keys).first
end