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Contents
# frozen_string_literal: true
# override Hash class
class Hash
# This method is used for iterating over a Hash , but besides yielding the key and the value, this will also yield the parent
# key of the current Hash object if the Hash is associated to a key
#
# @example Printing a Hash that contains other hashes inside, and fetching the parent keys
# hash = {
# key: :my_value,
# key2: {
# innner_key: :inner_value
# }
# }
# hash.each_with_parent { |parent, key, value| puts [parent, key, value].inspect }
# will print:
# [nil, :key, :my_value]
# [:key2, :innner_key, :inner_value]
#
# @see #deep_hash_with_parent
#
# @param [String, nil] parent The parent key of the current level of the Hash
# ( first level of any Hash has no parent, but if the hash has a value which is also a Hash,
# the parent of that value will be the key associated to the value )
# @param [Proc] &block The block which will be used to yield the parent string, the current key and the value,
# while the Hash is being iterated over
#
# @return [void]
def each_with_parent(parent = nil, &block)
each do |key, value|
if value.is_a?(Hash)
deep_hash_with_parent(value, key, &block)
elsif block_given?
yield(parent, key, value)
end
end
end
# Checks if the value is a Hash , and will execute the each with parent for the given hash
# @see #each_with_parent
#
# @param [Hash] value The Hash that will be used for iteration
# @param [Hash] key The key that will be sent as the parent key of the specified Hash
# @param [Proc] &block The block which will be used to yield the parent string, the current key and the value,
# while the Hash is being iterated over
#
# @return [void]
def deep_hash_with_parent(value, key, &block)
return unless value.is_a?(Hash)
value.each_with_parent(key, &block)
end
end
Version data entries
13 entries across 13 versions & 1 rubygems