filter

filter

Generic filter procedure. It is defined for lists, vectors, tables, and sets.

(def xs '(foo 2 bar 3 baz 5))
(filter num? xs)     ; (2 3 5)
(filter symbol? xs)  ; (foo bar baz)

(def v #(vector foo 2 bar 3 baz 5))
(filter num? v)     ; #(vector 2 3 5)
(filter symbol? v)  ; #(vector foo bar baz)

(def s #(set foo 2 bar 3 baz 5))
(filter num? s)      ; #(set 5 2 3)
(filter symbol? s)   ; #(set bar baz foo)

(def t (: foo 2 bar 3 baz 5))

(filter (lambda (p) (= p.head 'foo)) t)
   ; #(table foo 2)

(filter (lambda (p) (= p.tail 5)) t)
   ; #(table baz 5)