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group-by-intervals (clj)
(source)function
(group-by-intervals intervals-to-group-by ivals)
Divide intervals in s1 by (disjoint ordered) intervals in s2,
splitting if necessary, grouping by s2. Complexity is O(n) rather
than O(n^2)
Examples
tick
(ns tick.alpha.interval-test
(:require
[clojure.spec.alpha :as s]
[tick.core :as t]
[tick.protocols :as p]
[clojure.test
:refer [deftest is testing run-tests]
:refer-macros [deftest is testing run-tests]]
[tick.alpha.interval :as ti]
#?@(:cljs [[java.time :refer [Instant LocalDateTime LocalTime]]]))
#?(:clj
(:import [java.time LocalDateTime Instant LocalTime])))
(deftest group-by-intervals-test
(testing "p and s"
(t/with-clock t/UTC
(is
(=
{(t/year 2017) [(ti/new-interval
(t/date-time "2017-12-20T00:00")
(t/date-time "2018-01-01T00:00"))]
(t/year 2018) [(ti/new-interval
(t/date-time "2018-01-01T00:00")
(t/date-time "2018-01-10T00:00"))]}
(ti/group-by
(ti/divide (ti/bounds (t/year 2016) (t/year 2019)) t/year)
[(ti/new-interval (t/date-time "2017-12-20T00:00")
(t/date-time "2018-01-10T00:00"))])))))