4 releases
0.1.3 | Oct 2, 2024 |
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0.1.2 | Feb 25, 2024 |
0.1.1 | Jan 7, 2024 |
0.1.0 | Dec 26, 2023 |
#1004 in Data structures
25 downloads per month
Used in cseq_benchmark
215KB
3K
SLoC
cseq
is the Rust library (by Piotr Beling) of compact sequences.
Example
use cseq::elias_fano;
let ef = elias_fano::Sequence::with_items_from_slice(&[0u64, 1, 801, 920, 999]);
assert_eq!(ef.get(2), Some(801)); // get value at index
assert_eq!(ef.get(5), None);
assert_eq!(ef.iter().collect::<Vec<_>>(), [0, 1, 801, 920, 999]);
assert_eq!(ef.iter().rev().collect::<Vec<_>>(), [999, 920, 801, 1, 0]);
assert_eq!(ef.geq_cursor(801).collect::<Vec<_>>(), [801, 920, 999]);
assert_eq!(ef.geq_cursor(802).collect::<Vec<_>>(), [920, 999]);
let mut c = ef.cursor_of(801).unwrap(); // find the item by value
assert_eq!(c.index(), 2);
assert_eq!(c.value(), Some(801));
c.advance(); // and its successors:
assert_eq!(c.index(), 3);
assert_eq!(c.value(), Some(920));
c.advance();
assert_eq!(c.index(), 4);
assert_eq!(c.value(), Some(999));
c.advance();
assert_eq!(c.index(), 5);
assert_eq!(c.value(), None);
Benchmarks
The performance of some of the structures included in cseq
can be tested with the cseq_benchmark crate.