function
boot.janet on line 817 , column 1
(extreme order args )
Returns the most extreme value in `args` based on the function
`order` . `order` should take two values and return true or false (a
comparison ). Returns nil if `args` is empty.
(extreme < [1 2 3 ]) # => 1
(extreme > [1 2 3 ]) # => 3