ENV.to_s â "ENV" Class Public methods Returns âENVâ

ENV.reject! { |name, value| } â ENV or nilENV.reject! â Enumerator Class Public methods

ENV.select! { |name, value| } â ENV or nilENV.select! â Enumerator Class Public methods

ENV.shift â Array or nil Class Public methods Removes an environment variable

ENV.reject { |name, value| } â HashENV.reject â Enumerator Class Public methods

ENV.fetch(name) â valueENV.fetch(name, default) â valueENV.fetch(name) { |missing_name| ... } â value

ENV.value?(value) â true or false Class Public methods Returns true

ENV.each_value { |value| } â HashENV.each_value â Enumerator Class Public methods

ENV.assoc(name) â Array or nil Class Public methods Returns an Array of the

ENV.key(value) â name Class Public methods Returns the name of the environment