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@tyriar/fibonacci-heap
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An implementation of the Fibonacci heap data structure
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Readme
A TypeScript implementation of the Fibonacci heap data structure.
Note that the primary purpose of this library is education but it should work in a production environment as well. It's certainly not as performant as it could be as it optimises for readability, abstraction and safety over raw performance.
npm install --save @tyriar/fibonacci-heap
See the typings file for the full API.
// Import npm module
import { FibonacciHeap } from '@tyriar/fibonacci-heap';
// Construct FibonacciHeap
const heap = new FibonacciHeap<number, any>();
// Insert keys only
heap.insert(3);
heap.insert(7);
// Insert keys and values
heap.insert(8, {foo: 'bar'});
heap.insert(1, {foo: 'baz'});
// Extract all nodes in order
while (!heap.isEmpty()) {
const node = heap.extractMinimum();
console.log('key: ' + node.key + ', value: ' + node.value);
}
// > key: 1, value: [object Object]
// > key: 3, value: undefined
// > key: 7, value: undefined
// > key: 8, value: [object Object]
// Construct custom compare FibonacciHeap
const heap2 = new FibonacciHeap<string, string>(function (a, b) {
return (a.key + a.value).localeCompare(b.key + b.value);
});
heap2.insert('2', 'B');
heap2.insert('1', 'a');
heap2.insert('1', 'A');
heap2.insert('2', 'b');
// Extract all nodes in order
while (!heap2.isEmpty()) {
const node = heap2.extractMinimum();
console.log('key: ' + node.key + ', value: ' + node.value);
}
// > key: 1, value: a
// > key: 1, value: A
// > key: 2, value: b
// > key: 2, value: B
Operation | Complexity |
---|---|
clear | Θ(1)* |
decreaseKey | Θ(1)* |
delete | O(log n)* |
extractMinimum | O(log n)* |
findMinimum | Θ(1) |
insert | Θ(1) |
isEmpty | Θ(1) |
size | Θ(n) |
union | Θ(1) |
* amortized
FAQs
An implementation of the Fibonacci heap data structure
The npm package @tyriar/fibonacci-heap receives a total of 443,776 weekly downloads. As such, @tyriar/fibonacci-heap popularity was classified as popular.
We found that @tyriar/fibonacci-heap demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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