ENV.rehash Class Public methods Re-hashing the environment variables does nothing. It is provided for compatibility with Hash.

ENV.rassoc(value) Class Public methods Returns an Array of the name and value of the environment variable with value or nil if the value cannot be found.

pretty_print(q) Class Public methods

ENV.member?(name) â true or false Class Public methods Returns true if there is an environment variable with the given name.

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

ENV.keys â Array Class Public methods Returns every environment variable name in an Array

ENV.key?(name) â true or false Class Public methods Returns true if there is an environment variable with the given name.

ENV.key(value) â name Class Public methods Returns the name of the environment variable with value. If the value is not found nil is returned.

ENV.keep_if { |name, value| } â HashENV.keep_if â Enumerator Class Public methods Deletes every environment variable where the block evaluates to false. Returns an enumerator if no block was given.

ENV.invert â Hash Class Public methods Returns a new hash created by using environment variable names as values and values as names.