Methods
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Instance Public methods
assert_valid_keys(*valid_keys)

Source: show 

# File rails/activesupport/lib/active_support/core_ext/hash/keys.rb, line 46
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
stringify_keys()

Return a new hash with all keys converted to strings.

Source: show 

# File rails/activesupport/lib/active_support/core_ext/hash/keys.rb, line 6
def stringify_keys
  inject({}) do |options, (key, value)|
    options[key.to_s] = value
    options
  end
end
stringify_keys!()

Destructively convert all keys to strings.

Source: show 

# File rails/activesupport/lib/active_support/core_ext/hash/keys.rb, line 14
def stringify_keys!
  keys.each do |key|
    unless key.class.to_s == "String" # weird hack to make the tests run when string_ext_test.rb is also running
      self[key.to_s] = self[key]
      delete(key)
    end
  end
  self
end
symbolize_keys()

Return a new hash with all keys converted to symbols.

Also aliased as: to_options

Source: show 

# File rails/activesupport/lib/active_support/core_ext/hash/keys.rb, line 25
def symbolize_keys
  inject({}) do |options, (key, value)|
    options[key.to_sym] = value
    options
  end
end
symbolize_keys!()

Destructively convert all keys to symbols.

Also aliased as: to_options!

Source: show 

# File rails/activesupport/lib/active_support/core_ext/hash/keys.rb, line 33
def symbolize_keys!
  keys.each do |key|
    unless key.is_a?(Symbol)
      self[key.to_sym] = self[key]
      delete(key)
    end
  end
  self
end
to_options()
to_options!()