Class: Hash

Inherits:
Object
  • Object
show all
Defined in:
lib/values_at_nested/core_ext/hash/values_at_nested.rb

Instance Method Summary collapse

Instance Method Details

#iterate_over_nested(keys) ⇒ Object 



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# File 'lib/values_at_nested/core_ext/hash/values_at_nested.rb', line 17

def iterate_over_nested(keys)
  keys.collect do |key|
    value = self[key]

    if key.is_a?(Hash)
      key.collect do |k, v|
        if Hash === v
          yield [k, v.iterate_over_nested(v.keys) { |kn| kn }].flatten
        elsif Array === v
          v.collect { |vi| yield [k, vi] }
        else
          yield [k, v]
        end
      end.flatten 1

    elsif key.is_a?(Symbol) && value.is_a?(Hash)
      value.iterate_over_nested(value.keys) { |k| yield [key, k]}
    elsif key.is_a?(Symbol) && value.is_a?(Symbol)
      yield [key, value]
    else
      yield key
    end
  end
end

#values_at_nested(*nested_keys) ⇒ Object

Returns an array that holds the values of the given keys list of various depth.

Example:

hash = { a: 58, b: { x: true, y: false }, c: nil }

hash.values_at_nested(:b, :c)             # => [58, nil]
hash.values_at_nested(:a, b: [:x])        # => [58, [true]]
hash.values_at_nested(:a, b: [:x, :y])    # => [58, [true, false]]



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# File 'lib/values_at_nested/core_ext/hash/values_at_nested.rb', line 13

def values_at_nested(*nested_keys)
  nested_keys.empty? ?  [] : iterate_over_nested(nested_keys) { |k| self.dig(*k) }
end