clojure.set — org.clojure/clojure 1.5.0-alpha3

Set operations such as union/intersection.

difference clj

(difference s1)

(difference s1 s2)

(difference s1 s2 & sets)

Return a set that is the first set without elements of the remaining sets

index clj

(index xrel ks)

Returns a map of the distinct values of ks in the xrel mapped to a set of the maps in xrel with the corresponding values of ks.

intersection clj

(intersection s1)

(intersection s1 s2)

(intersection s1 s2 & sets)

Return a set that is the intersection of the input sets

join clj

(join xrel yrel)

(join xrel yrel km)

When passed 2 rels, returns the rel corresponding to the natural join. When passed an additional keymap, joins on the corresponding keys.

map-invert clj

(map-invert m)

Returns the map with the vals mapped to the keys.

project clj

(project xrel ks)

Returns a rel of the elements of xrel with only the keys in ks

rename clj

(rename xrel kmap)

Returns a rel of the maps in xrel with the keys in kmap renamed to the vals in kmap

rename-keys clj

(rename-keys map kmap)

Returns the map with the keys in kmap renamed to the vals in kmap

select clj

(select pred xset)

Returns a set of the elements for which pred is true

subset? clj

(subset? set1 set2)

Is set1 a subset of set2?

superset? clj

(superset? set1 set2)

Is set1 a superset of set2?

union clj

(union)

(union s1)

(union s1 s2)

(union s1 s2 & sets)

Return a set that is the union of the input sets