api_coco.md

API: Coco

Status: Unstable

Warning: This API is kept for backward compatibility. It uses specialized substring semantics and does not match structured sketch interfaces.

Purpose

Substring-based aggregation sketch for arbitrary string keys.

Type/Struct

• Coco<H = DefaultXxHasher>
• CocoBucket

Constructors

fn new() -> Self
fn init_with_size(w: usize, d: usize) -> Self

Insert/Update

fn insert(&mut self, key: &str, v: u64)

Query

fn estimate(&mut self, partial_key: &str) -> u64
fn estimate_with_udf<F>(&mut self, partial_key: &str, udf: F) -> u64

Merge

fn merge(&mut self, other: &Coco<H>)

Serialization

Derives serde; no dedicated byte API helpers.

Examples

use asap_sketchlib::Coco;

let mut sk = Coco::init_with_size(64, 4);
sk.insert("region=us|id=1", 3);
let _ = sk.estimate("region=us");

Caveats

• Query semantics are substring/UDF based (not exact-key frequency).
• Replacement behavior is probabilistic.

Status

Unstable.