nested_hash_pattern

🚀 Nested Hash Destructuring with Pattern Matching

Extract deeply nested hash values in place without manual traversals. The pattern matching in clause can destructure nested keys and bind them to local variables in one go.

def handle_payload(payload)
  case payload
  in { user: { id:, profile: { role: "admin" } }, metadata: { ip: } }
    puts "Admin user #{id} from #{ip}"
  in { user: { id: }, metadata: {} }
    puts "Regular user #{id}"
  else
    puts "Unknown payload"
  end
end