🦀 Rust crate that allows creating weighted prefix trees that can be used in autocomplete

Related tags

Learning Resources rust autocomplete trie prefix-tree autosuggestions weighted-trie
Overview

weighted_trie

🦀 Rust crate that allows creating weighted prefix trees that can be used in autocomplete

Released API Docs

License: Apache 2.0

Quickstart

To use weigthed-trie, add the following to your Cargo.toml file:

[dependencies]
weighted_trie = "0.1.0"  # NOTE: Replace to latest minor version.

Usage overview

use weighted_trie::WeightedTrie;

fn main() {
   let mut trie = WeightedTrie::new();
    // build trie with words and assoicated weights
    trie.insert("pie".to_owned(), 5);
    trie.insert("pita".to_owned(), 2);
    trie.insert("pi".to_owned(), 1);
    trie.insert("pizza".to_owned(), 10);

    // get prefix based suggestions sorted by weight
    let suggestions = trie.search("pi");
    assert_eq!(suggestions, vec!["pizza", "pie", "pita", "pi"]);

    let suggestions = trie.search("piz");
    assert_eq!(suggestions, vec!["pizza"]);

    // out of vocabulary
    let suggestions = trie.search("apple");
    assert_eq!(suggestions.len(), 0);

}

Alternatively you can use .build method

use weighted_trie::{WeightedString, WeightedTrie};

fn main() {
    let weighted_strings = vec![
           WeightedString {
               word: "pie".to_owned(),
               weight: 5,
           },
           WeightedString {
               word: "pita".to_owned(),
               weight: 2,
           },
           WeightedString {
               word: "pi".to_owned(),
               weight: 1,
           },
           WeightedString {
               word: "pizza".to_owned(),
               weight: 10,
           },
       ];

    let trie = WeightedTrie::build(weighted_strings);

}

Benchmarks

Using 100k weighted strings

weighted_trie/insert    time:   [342.41 ms 343.86 ms 345.56 ms]
weighted_trie/lookup    time:   [1.8608 ms 1.9351 ms 2.0834 ms]
weighted_trie/build     time:   [326.27 ms 330.74 ms 337.03 ms]

Guidelines

README.md is generated from cargo readme command. Do not manually update README.md instead edit src/lib.rs and then run cargo readme > README.md.

TODO:

  1. Add tests
  2. Benchmark lookup speed
  3. Benchmark insert speed
  4. Measure memory footprint
  5. Try low hanging fruit optimizations like usage of hashbrown instead of standart HashMap

License

License: Apache-2.0

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Releases(v0.1.3)

  • v0.1.3(Feb 18, 2023)

    What's Changed

    • add build to WeightedTrie by @sa- in https://github.com/subpath/weighted_trie/pull/1

    New Contributors

    • @sa- made their first contribution in https://github.com/subpath/weighted_trie/pull/1

    Full Changelog: https://github.com/subpath/weighted_trie/compare/v0.1.2...v0.1.3

    Source code(tar.gz)
    Source code(zip)

  • v0.1.2(Feb 12, 2023)

  • v0.1.1(Feb 11, 2023)

  • v0.1.0(Feb 11, 2023)

Owner
Alexander Osipenko
Alexander Osipenko
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