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