Namespace: clojure.set

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Set operations. Provides functions for creating, manipulating, and querying sets.

Functions

Predicates

subset?

(subset? s1 s2)

Is set1 a subset of set2?

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superset?

(superset? s1 s2)

Is set1 a superset of set2?

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General

difference

(difference s)
(difference s1 s2)
(difference s1 s2 & sets)

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

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index

(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.

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intersection

(intersection s)
(intersection s1 s2)
(intersection s1 s2 & sets)

Return a set that is the intersection of the input sets.

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join

(join xrel yrel)
(join xrel yrel km)

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

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map-invert

(map-invert m)

Returns the map with the vals mapped to the keys.

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project

(project xrel ks)

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

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rename

(rename xrel kmap)

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

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rename-keys

(rename-keys m kmap)

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

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select

(select pred s)

Returns a set of the elements for which pred is true.

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union

(union)
(union s)
(union s1 s2)
(union s1 s2 & sets)

Return a set that is the union of the input sets.

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