HashieWalker

Hash-version of Array#map that is recursive and works on keys and values simultaneously.

Installation

Add this line to your application's Gemfile:

gem 'hashie_walker'

And then execute:

$ bundle

Or install it yourself as:

$ gem install hashie_walker

Usage

HashieWalker walks through object and transforms keys and values along the way.

object = { "One" => 1, "Two" => 2 }

HashieWalker.walk(object) do |map|
  map.key { |key| key.downcase }
  map.value { |value| value * value }
end
# => { "one" => 1, "two" => 4 }

Object can be a Hash, Array or nested structure (e.g. an array of nested hashes with arrays as values). See specs for more examples.

If you want to change only keys or values simply provide only a respective mapping function.

HashieWalker.walk(object) do |map|
  map.key { |key| key.downcase }
end
# => { "one" => 1, "two" => 2 }

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request