A simple library for encoding and decoding a stream of values as delta-encoded. For example, if you have a stream of values like this:
1, 3, 2, 4, 5
the delta-encoded stream would be:
1, 2, -1, 2, 1
use delta_encoding::{DeltaEncoderExt, DeltaDecoderExt};
pub fn main() {
let data = vec![1, 2, 5, 4, 2];
// Delta-encode without consuming, and without making a vector copy
let encoded: Vec<i64> = data.iter().copied().deltas().collect();
assert_eq!(encoded, vec![1, 1, 3, -1, -2]);
// Consume and delta-encode
let encoded: Vec<i64> = data.into_iter().deltas().collect();
assert_eq!(encoded, vec![1, 1, 3, -1, -2]);
let data = vec![1, 1, 3, -1, -2];
// Delta-decode without consuming, and without making a vector copy
let decoded: Vec<i64> = data.iter().copied().original().collect();
assert_eq!(decoded, vec![1, 2, 5, 4, 2]);
// Consume and delta-decode
let decoded: Vec<i64> = data.into_iter().original().collect();
assert_eq!(decoded, vec![1, 2, 5, 4, 2]);
}- This project is easier to develop with just, a modern alternative to
make. Install it withcargo install just. - To get a list of available commands, run
just. - To run tests, use
just test.
Licensed under either of
- Apache License, Version 2.0 (LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or https://opensource.org/licenses/MIT) at your option.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual-licensed as above, without any additional terms or conditions.