Find key/value pairs deep inside a hash containing an arbitrary number of nested hashes and arrays

Question

A web service is returning a hash that contains an unknown number of nested hashes, some of which contain an array, which in turn contains an unknown number of nested hashes

Answer 1

No need for monkey patching, just use Hashie gem: https://github.com/intridea/hashie#deepfind

user = {
  name: { first: 'Bob', last: 'Boberts' },
  groups: [
    { name: 'Rubyists' },
    { name: 'Open source enthusiasts' }
  ]
}

user.extend Hashie::Extensions::DeepFind

user.deep_find(:name)   #=> { first: 'Bob', last: 'Boberts' }

For arbitrary Enumerable objects, there is another extension available, DeepLocate: https://github.com/intridea/hashie#deeplocate