clojure.core/descendants

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Type: function Added: Clojure 1.0 Examples: 2 Runnable: 1

([tag] [h tag])

Returns the immediate and indirect children of tag, through a relationship established via derive. h must be a hierarchy obtained from make-hierarchy, if not supplied defaults to the global hierarchy. Note: does not work on Java type inheritance relationships.

Examples

by shockbob on 2011-08-21 ▶

;; simple example a toy poodle is a poodle is a dog is an animal (derive ::dog ::animal) nil (derive ::poodle ::dog) nil (derive ::toy_poodle ::poodle) nil (descendants ::animal) #{:user/toy_poodle :user/poodle :user/dog}

by uosl on 2020-08-19 . May have evaluation errors. ▶

;; You can combine `descendants` with `parents` to only get the immediate children. (filter #(contains? (parents h %) tag) (descendants h tag))

See also

• clojure.core/ancestors (1)

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