class Hash

Returns a new hash with all keys converted to strings. This includes the keys from the root hash and from all nested hashes.

hash = { person: { name: 'Rob', age: '28' } }

hash.deep_stringify_keys
# => {"person"=>{"name"=>"Rob", "age"=>"28"}}

# File lib/deep_hash_transform.rb, line 106
def deep_stringify_keys
  deep_transform_keys { |key| key.to_s }
end

Destructively convert all keys to strings. This includes the keys from the root hash and from all nested hashes.

# File lib/deep_hash_transform.rb, line 113
def deep_stringify_keys!
  deep_transform_keys! { |key| key.to_s }
end

Returns a new hash with all keys converted to symbols, as long as they respond to to_sym. This includes the keys from the root hash and from all nested hashes.

hash = { 'person' => { 'name' => 'Rob', 'age' => '28' } }

hash.deep_symbolize_keys
# => {:person=>{:name=>"Rob", :age=>"28"}}

# File lib/deep_hash_transform.rb, line 125
def deep_symbolize_keys
  deep_transform_keys { |key| key.to_sym rescue key }
end

Destructively convert all keys to symbols, as long as they respond to to_sym. This includes the keys from the root hash and from all nested hashes.

# File lib/deep_hash_transform.rb, line 132
def deep_symbolize_keys!
  deep_transform_keys! { |key| key.to_sym rescue key }
end

Returns a new hash with all keys converted by the block operation. This includes the keys from the root hash and from all nested hashes.

hash = { person: { name: 'Rob', age: '28' } }

hash.deep_transform_keys{ |key| key.to_s.upcase }
# => {"PERSON"=>{"NAME"=>"Rob", "AGE"=>"28"}}

# File lib/deep_hash_transform.rb, line 79
def deep_transform_keys(&block)
  result = {}
  each do |key, value|
    result[yield(key)] = value.is_a?(Hash) ? value.deep_transform_keys(&block) : value
  end
  result
end

Destructively convert all keys by using the block operation. This includes the keys from the root hash and from all nested hashes.

# File lib/deep_hash_transform.rb, line 90
def deep_transform_keys!(&block)
  keys.each do |key|
    value = delete(key)
    self[yield(key)] = value.is_a?(Hash) ? value.deep_transform_keys!(&block) : value
  end
  self
end

Returns a new hash with all keys converted to strings.

hash = { name: 'Rob', age: '28' }

hash.stringify_keys
# => { "name" => "Rob", "age" => "28" }

# File lib/deep_hash_transform.rb, line 44
def stringify_keys
  transform_keys { |key| key.to_s }
end

Destructively convert all keys to strings. Same as stringify_keys, but modifies self.

# File lib/deep_hash_transform.rb, line 50
def stringify_keys!
  transform_keys! { |key| key.to_s }
end

Returns a new hash with all keys converted to symbols, as long as they respond to to_sym.

hash = { 'name' => 'Rob', 'age' => '28' }

hash.symbolize_keys
# => { name: "Rob", age: "28" }

# File lib/deep_hash_transform.rb, line 61
def symbolize_keys
  transform_keys { |key| key.to_sym rescue key }
end

Destructively convert all keys to symbols, as long as they respond to to_sym. Same as symbolize_keys, but modifies self.

# File lib/deep_hash_transform.rb, line 67
def symbolize_keys!
  transform_keys! { |key| key.to_sym rescue key }
end

Returns a new hash with all keys converted using the block operation.

hash = { name: 'Rob', age: '28' }

hash.transform_keys{ |key| key.to_s.upcase }
# => {"NAME"=>"Rob", "AGE"=>"28"}

# File lib/deep_hash_transform.rb, line 21
def transform_keys
  result = {}
  each_key do |key|
    result[yield(key)] = self[key]
  end
  result
end

Destructively convert all keys using the block operations. Same as transform_keys but modifies self.

# File lib/deep_hash_transform.rb, line 31
def transform_keys!
  keys.each do |key|
    self[yield(key)] = delete(key)
  end
  self
end