ENV.values_at(name, ...) â Array Class Public methods Returns an array containing

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

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

ENV.length Class Public methods Returns the number of environment variables

ENV.each_key { |name| } â HashENV.each_key â Enumerator Class Public methods

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

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

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

ENV.inspect â string Class Public methods Returns the contents of the environment

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