Module: ActiveSupport::CoreExtensions::Hash::Keys

Included in:

Hash

Defined in:

lib/support/active_support_lite/keys.rb

Instance Method Summary (collapse)

• - (Object) assert_valid_keys(*valid_keys)

  Validate all keys in a hash match *valid keys, raising ArgumentError on a mismatch.

• - (Object) stringify_keys

  Return a new hash with all keys converted to strings.

• - (Object) stringify_keys!

  Destructively convert all keys to strings.

• - (Object) symbolize_keys (also: #to_options)

  Return a new hash with all keys converted to symbols.

• - (Object) symbolize_keys! (also: #to_options!)

  Destructively convert all keys to symbols.

{ :name => "Rob", :years => "28" }.assert_valid_keys(:name, :age) # => raises "ArgumentError: Unknown key(s): years"
{ :name => "Rob", :age => "28" }.assert_valid_keys("name", "age") # => raises "ArgumentError: Unknown key(s): name, age"
{ :name => "Rob", :age => "28" }.assert_valid_keys(:name, :age) # => passes, raises nothing

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# File 'lib/support/active_support_lite/keys.rb', line 50

def assert_valid_keys(*valid_keys)
  unknown_keys = keys - [valid_keys].flatten
  raise(ArgumentError, "Unknown key(s): #{unknown_keys.join(", ")}") unless unknown_keys.empty?
end

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# File 'lib/support/active_support_lite/keys.rb', line 7

def stringify_keys
  inject({}) do |options, (key, value)|
    options[key.to_s] = value
    options
  end
end

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# File 'lib/support/active_support_lite/keys.rb', line 16

def stringify_keys!
  keys.each do |key|
    self[key.to_s] = delete(key)
  end
  self
end

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# File 'lib/support/active_support_lite/keys.rb', line 25

def symbolize_keys
  inject({}) do |options, (key, value)|
    options[(key.to_sym rescue key) || key] = value
    options
  end
end

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# File 'lib/support/active_support_lite/keys.rb', line 34

def symbolize_keys!
  self.replace(self.symbolize_keys)
end