[−][src]Crate rangemap
RangeMap is a map data structure whose keys are stored as ranges. Contiguous and overlapping ranges that map to the same value are coalesced into a single range.
A corresponding RangeSet structure is also provided.
Example: use with Chrono
use chrono::offset::TimeZone; use chrono::{Duration, Utc}; use rangemap::RangeMap; fn main() { let people = ["Alice", "Bob", "Carol"]; let mut roster = RangeMap::new(); // Set up initial roster. let start_of_roster = Utc.ymd(2019, 1, 7); let mut week_start = start_of_roster; for _ in 0..3 { for person in &people { let next_week = week_start + Duration::weeks(1); roster.insert(week_start..next_week, person); week_start = next_week; } } // Bob is covering Alice's second shift (the fourth shift overall). let fourth_shift_start = start_of_roster + Duration::weeks(3); let fourth_shift_end = fourth_shift_start + Duration::weeks(1); roster.insert(fourth_shift_start..fourth_shift_end, &"Bob"); for (range, person) in roster.iter() { println!("{} ({}): {}", range.start, range.end - range.start, person); } // Output: // 2019-01-07UTC (P7D): Alice // 2019-01-14UTC (P7D): Bob // 2019-01-21UTC (P7D): Carol // 2019-01-28UTC (P14D): Bob // 2019-02-11UTC (P7D): Carol // 2019-02-18UTC (P7D): Alice // 2019-02-25UTC (P7D): Bob // 2019-03-04UTC (P7D): Carol }
Structs
RangeMap | A map whose keys are stored as ranges. |
RangeSet | A set whose items are stored as ranges. |