4.7 Sets

8.12

package: rebellion

value
empty-set : empty-set?

The empty immutable set.

procedure
(empty-set? v) → boolean?
v : any/c

A predicate for empty immutable sets. Implies set?.

procedure
(nonempty-set? v) → boolean?
v : any/c

A predicate for nonempty immutable sets. Implies set?.

procedure
(mutable-set? v) → boolean?
v : any/c

A predicate for mutable sets. Equivalent to set-mutable?.

value
into-set : (reducer/c any/c set?)
value
into-mutable-set : (reducer/c any/c set-mutable?)

Reducers that collect elements of the reduced sequence into either an immutable set or a mutable set, respectively.

Example:

> (transduce (list "the" "quick" "brown" "fox")
(mapping immutable-string-length)
#:into into-set)
(set 3 5)