module Gorillib::Hashlike::Keys

Public Instance Methods

assert_valid_keys(*valid_keys) click to toggle source

Validate all keys in a hash match *valid keys, raising ArgumentError on a mismatch. Note that keys are NOT treated indifferently, meaning if you use strings for keys but assert symbols as keys, this will fail.

Examples

{ :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
# File lib/gorillib/hashlike/keys.rb, line 40
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() click to toggle source

Return a new hash with all keys converted to strings.

# File lib/gorillib/hashlike/keys.rb, line 5
def stringify_keys
  dup.stringify_keys!
end
stringify_keys!() click to toggle source

Destructively convert all keys to strings.

# File lib/gorillib/hashlike/keys.rb, line 10
def stringify_keys!
  keys.each do |key|
    self[key.to_s] = delete(key)
  end
  self
end
symbolize_keys() click to toggle source

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

# File lib/gorillib/hashlike/keys.rb, line 19
def symbolize_keys
  dup.symbolize_keys!
end
symbolize_keys!() click to toggle source

Destructively convert all keys to symbols, as long as they respond to to_sym.

# File lib/gorillib/hashlike/keys.rb, line 25
def symbolize_keys!
  keys.each do |key|
    self[(key.to_sym rescue key) || key] = delete(key)
  end
  self
end