Name: linked
Owner: Metosin
Description: Clojure(Script) efficient map and set structures that preserve insertion order
Created: 2018-03-27 12:00:24.0
Updated: 2018-03-27 12:37:45.0
Pushed: 2018-03-27 12:37:44.0
Homepage: http://frankiesardo.github.io/linked
Size: 126
Language: Clojure
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Map and Set structures that rememeber the insertion order of its elements, even after multiple assoc and dissoc. For Clojure and ClojureScript.
uire '[linked.core :as linked])
ked/map :b 2 :a 1 :d 4)
#linked/map [[:b 2] [:a 1] [:d 4]]
oc (linked/map :b 2 :a 1 :d 4) :c 3)
#linked/map [[:b 2] [:a 1] [:d 4] [:c 3]]
o (linked/map) [[:c 3] [:a 1] [:d 4]])
#linked/map [[:c 3] [:a 1] [:d 4]]
soc (linked/map :c 3 :a 1 :d 4) :a)
#linked/map [[:c 3] [:d 4]]
uire '[linked.core :as linked])
ked/set 4 3 1 8 2)
#linked/set [4 3 1 8 2]
j (linked/set 9 10) 1 2 3)
#linked/set [9 10 1 2 3]
o (linked/set) [7 6 1 5 6])
#linked/set [7 6 1 5]
j (linked/set 8 1 7 2 6) 7)
#linked/set [8 1 2 6]
These data structures wrap a normal hash-map but instead of feeding it a normal [key value] pair their remeber a [key value left-key right-key] record. When an item is removed from the data structure it is sufficient to update the left and right node to reference each others keys while removing the chosen node. This implementation yields the same Big O time and space complexity of a standard hash-map (altought effective performance will be slower by a constant factor).
Copyright © 2014 Frankie Sardo
Distributed under the Eclipse Public License either version 1.0 or (at your option) any later version.