empty?

tests whether the provided forms are empty sequences

If all forms evaluate to empty sequences, then this function will return #t (true). The first evaluation that is not an empty sequence will result in the function returning #f (false).

An Example

(empty? '(1 2 3 4) [] {})

This example will return #f (false) because the first form is a list with four elements.

Like most predicates, this function can also be negated by prepending the ! character. This means that all the provided forms must not be nil.

(!empty? '(1) [2] "3" {4 5})

This example will return #t (true) because all the arguments are non-empty sequences of some kind.