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@thi.ng/heaps
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[!NOTE] This is one of 190 standalone projects, maintained as part of the @thi.ng/umbrella monorepo and anti-framework.
🚀 Please help me to work full-time on these projects by sponsoring me on GitHub. Thank you! ❤️
Various heap implementations for arbitrary values and with customizable ordering.
Type agnostic Heap and Priority Queue implementations with customizable
ordering and fanout / tree arity (in case of DHeap
) and largely unified API:
Heap
)DHeap
)PairingHeap
)PriorityQueue
)STABLE - used in production
Search or submit any issues for this package
yarn add @thi.ng/heaps
ES module import:
<script type="module" src="https://cdn.skypack.dev/@thi.ng/heaps"></script>
For Node.js REPL:
const heaps = await import("@thi.ng/heaps");
Package sizes (brotli'd, pre-treeshake): ESM: 2.01 KB
import { defDHeap } from "@thi.ng/heaps";
// with initial values, custom comparator and heap arity
const h = defDHeap<number>(
[5, 2, 10, 15, 18, 23, 22, -1],
{
// custom comparator
compare: (a, b) => b - a,
// branch size (DHeap only)
d: 4
}
);
h.pop();
// 23
h.pop();
// 22
// insert new value unless it's a new root
// else pop and return current root
h.pushPop(16)
// 18
h.push(24);
Even though all provided heap implementations support arbitrary values and
comparators and could be used as-is to implement a priority queue, since v1.3.0
this package also includes a dedicated
PriorityQueue
class, a thin veneer wrapper for a backing Heap
and exposing a PQ-like API for
arbitrary values, with configurable value equality handling and priority
ordering:
peek()
and/or peekPriority()
without removing it from the queueinto()
import { defPriorityQueue } from "@thi.ng/heaps";
// use default config
const queue = defPriorityQueue();
// add items
queue.push(["alice", 5]);
queue.into([["bob", 3], ["charlie", 10], ["dora", 8]]);
// peek at top priority item
queue.peek()
// "charlie"
queue.peekPriority()
// 10
// reprioritize
queue.reprioritize("alice", 20)
// retrieve & remove top priority item
queue.pop()
// "alice"
If this project contributes to an academic publication, please cite it as:
@misc{thing-heaps,
title = "@thi.ng/heaps",
author = "Karsten Schmidt",
note = "https://thi.ng/heaps",
year = 2017
}
© 2017 - 2024 Karsten Schmidt // Apache License 2.0
FAQs
Various heap implementations for arbitrary values and with customizable ordering
The npm package @thi.ng/heaps receives a total of 884 weekly downloads. As such, @thi.ng/heaps popularity was classified as not popular.
We found that @thi.ng/heaps demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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