clojure.set

Set operations such as union/intersection.

Usage: (difference s1)
       (difference s1 s2)
       (difference s1 s2 & sets)

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

Usage: (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.

Usage: (intersection s1)
       (intersection s1 s2)
       (intersection s1 s2 & sets)

Return a set that is the intersection of the input sets

Usage: (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.

Usage: (map-invert m)

Returns the map with the vals mapped to the keys.

Usage: (project xrel ks)

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

Usage: (rename xrel kmap)

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

Usage: (rename-keys map kmap)

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

Usage: (select pred xset)

Returns a set of the elements for which pred is true

Usage: (subset? set1 set2)

Is set1 a subset of set2?

Usage: (superset? set1 set2)

Is set1 a superset of set2?

Usage: (union)
       (union s1)
       (union s1 s2)
       (union s1 s2 & sets)

Return a set that is the union of the input sets