Iterate over a deeply nested level of hashes in Ruby

Question

So I have a hash, and for each level of the hash, I want to store its key and value. The problem is, a value can be another hash array. Furthermore, that hash can contain ke

Answer 1

If you want to recursively edit the hash, you could do something like this:

# Iterates over a Hash recursively
def each_recursive(parent, &block)
  parent.each do |path, value|
    if value.kind_of? Hash
      each_recursive parent, &block
    elsif value.is_a? Array
      # @TODo something different for Array?
    else
      yield(parent, path, container_or_field)
    end
  end
end

And you can do something like:

hash = {...}
each_recursive(hash) do |parent, path, value|
  parent[path] = value.uppercase
end