class Hash

Public Instance Methods

values_at_nested(*nested_keys) click to toggle source

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]]

# 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

Private Instance Methods

iterate_over_nested(keys) { |[k, send(:iterate_over_nested, keys) { |kn| kn }].flatten| ... } click to toggle source

# 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.send(:iterate_over_nested, v.keys) { |kn| kn }].flatten
        elsif Array === v
          v.map { |vi| yield [k, vi] }
        else
          yield [k, v]
        end
      end.flatten 1

    elsif key.is_a?(Symbol) && value.is_a?(Hash)
      value.send(: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