@clarketm/super

Data structures, data types, and algorithms with superpowers! 💪

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Readme

Super

NPM release Build Status Downloads Lerna License

Data structures, data types, and algorithms with superpowers! 💪😎

implemented in JavaScript.


"JavaScript's missing data structures, data types, and algorithms!" - Mark Twain


Installation

Yarn

$ yarn add @clarketm/super

Npm

$ npm install @clarketm/super --save

Usage

// 1. import `each` module `independently`
import { Array, Map, Queue, Trie, ... } from "@clarketm/super";

let array = new Array([1, 2]);
...

// 2. import `all` modules under a `namespace`
import Super from "@clarketm/super";

let array = new Super.Array([1, 2]);
...

Table of Contents

Data Structures

Data Types

Sorting Algorithms


Data Structures

Array

import { Array } from "@clarketm/super";

let array = new Array([0, 1, 2, 3]); // [0, 1, 2, 3]

// Use any built-in Array methods:
array.push(4); // [0, 1, 2, 3, 4]

// Use custom methods (e.g. `flat`):
let array = new Array([[[1]], [[2]], [[3]]]);
array.flat(2); // [1, 2, 3]

// sorting
array.bubbleSort(); // [0, 1, 2, 3]
array.insertionSort(); // [0, 1, 2, 3]
array.mergeSort(); // [0, 1, 2, 3]
array.quickSort(); // [0, 1, 2, 3]
array.selectionSort(); // [0, 1, 2, 3]

// sorting (w/ comparator)
array.bubbleSort((a, b) => b - a); // [3, 2, 1, 0]
array.insertionSort((a, b) => b - a); // [3, 2, 1, 0]
array.mergeSort((a, b) => b - a); // [3, 2, 1, 0]
array.quickSort((a, b) => b - a); // [3, 2, 1, 0]
array.selectionSort((a, b) => b - a); // [3, 2, 1, 0]

AVLTree

import { AVLTree } from "@clarketm/super";

let tree = new AVLTree([1, 2, 3, 4, 5, 6, 7, 8]);

//              4  -> root
//            /   \
//           2     6
//         /  \   /  \
//        1   3  5    7
//                     \
//                      8
//

tree.root; // AVLTreeNode { _value: 5, ... }
tree.height; // 1

tree.insert(9);

//              4  -> root
//            /   \
//           2     6
//         /  \   /  \
//        1   3  5    8
//                   / \
//                  7   9
//

tree.balanced; // true

tree.search(3); // AVLTreeNode { _value: 3, ... }

tree.remove(9);

//              4  -> root
//            /   \
//           2     6
//         /  \   /  \
//        1   3  5    8
//                   /
//                  7
//

// Use a custom comparator to determine tree hierarchy

// string length (ascending) comparator
let tree = new AVLTree(["green", "red", "blue"], (a, b) => a.length - b.length);

//            "blue"  -> root
//           /     \
//        "red"  "green"
//

tree.findMax().value; // "green"

BinaryTree

import { BinaryTree } from "@clarketm/super";

let tree = new BinaryTree([5, 3, 7, 2, 8, 4, 6, 1]);

//              5  -> root
//            /   \
//           3     7
//         /  \   /  \
//        2   4  6    8
//       /
//      1

tree.root; // BinaryTreeNode { _value: 5, ... }
tree.height; // 1

tree.insert(9);

//              5  -> root
//            /   \
//           3     7
//         /  \   /  \
//        2   4  6    8
//       /             \
//      1               9  -> node inserted
//

tree.search(3); // BinaryTreeNode { _value: 3, ... }

tree.remove(9);

//              5  -> root
//            /   \
//           3     7
//         /  \   /  \
//        2   4  6    8
//       /
//      1                -> node removed
//

// Use a custom comparator to determine tree hierarchy

// string length (ascending) comparator
let tree = new BinaryTree(["green", "red", "blue"], (a, b) => a.length - b.length);

//            "blue"  -> root
//           /     \
//        "red"  "green"
//

tree.findMax().value; // "green"

Heap

import { Heap } from "@clarketm/super";

// Max / Min (default) heap comparators
let { MAX, MIN } = Heap.HeapType;

let minHeap = new Heap([3, 7, 2, 5], MIN);

//              2  -> min
//            /   \
//           5     3
//          /
//         7
//

minHeap.min; // 2

minHeap.insert(8); // 5 : new size

//              2  -> min
//            /   \
//           5     3
//          /       \
//         7         8  -> node inserted
//

let min = minHeap.deleteMin(); // 2

//              3  -> min
//            /   \
//           5     8
//          /
//         7
//

let maxHeap = new Heap([3, 7, 2, 5], MAX);

//              7  -> max
//            /   \
//           5     3
//          /
//         2
//

maxHeap.max; // 7

maxHeap.isEmpty(); // false

maxHeap.clear();
maxHeap.size; // 0

LinkedList

import { LinkedList } from "@clarketm/super";

let list = new LinkedList([1, 3, 5, 7]);

//    1    <->    3    <->    5    <->    7

list.size; // 4
list.head; // ListNode { _value: 1, ... }
list.tail; // ListNode { _value: 7, ... }

list.insert(1, 100);

//         node inserted at pos: 1
//                 ^
//    1    <->    100    <->    3    <->    5    <->    7

list.append(99);

//                                                          node inserted at tail
//                                                                   ^
//    1    <->    100    <->    3    <->    5    <->    7    <->    99

list.remove(-1);

//                                                          node removed from tail
//                                                                   ^
//    1    <->    100    <->    3    <->    5    <->    7

list.toArray(); // [ 1, 100, 3, 5, 7 ]

Map

import { Map } from "@clarketm/super";

let map = new Map([["a", 1], ["b", 2], ["c", 3]]); // Map { 'a' => 1, 'b' => 2, 'c' => 3 }

// Use any built-in Map methods:
map.get("c"); // 3

// Use custom methods (e.g. `setDefault`):
// note: `setDefault` is similar to get(), but will set key to a defaultValue if the key is not in Map.

let item = map.setDefault("c", 3);
item; // 3
map; // Map { 'a' => 1, 'b' => 2, 'c' => 3 }

let item = map.setDefault("d", 4);
item; // 4
map; // Map { 'a' => 1, 'b' => 2, 'c' => 3 'd' => 4 }

Object

import { Object } from "@clarketm/super";

let object = new Object({ a: 1, b: true, c: 4 }); // Object { a: 1, b: true, c: 4 }

// Use any built-in Object methods:
Object.keys(object); // [ 'a', 'b', 'c' ]

// Use custom methods (e.g. `clone`):
// note: `clone` will create a deep copy of the object.

let clone = object.clone(); // Object { a: 1, b: true, c: 4 }
Object.is(object, clone); // false

PriorityQueue

import { PriorityQueue } from "@clarketm/super";

// note: a PriorityQueue can be constructed from either a Map, Array of Arrays, Array of Objects, or Array w/ custom comparator.

// Map
let pq = new PriorityQueue(new Map([[100, "high"], [0, "low"]]));

// Array of Arrays
let pq = new PriorityQueue([[100, "high"], [0, "low"]]);

// Array of Objects
let pq = new PriorityQueue([{ value: "high", priority: 100 }, { value: "low", priority: 0 }]);

// Array w/ custom comparator
let pq = new PriorityQueue(["high", "low"], (a, b) => a.length > b.length);

let pq = new PriorityQueue([[100, "high"], [50, "medium"], [0, "low"]]);

//    highest priority              lowest priority
//          ^                             ^
//   |    "high"    |   "medium"   |    "low"    |
//   |    (100)     |     (50)     |     (0)     |
//

pq.size; // 3
pq.high; // QueueNode { _value: 'super high', _priority: 1000, ... }
pq.low; // QueueNode { _value: 'low', _priority: 0, ... }

pq.isEmpty(); // false

pq.insert("super high", 1000); // 4 : new size

//       highest priority                                lowest priority
//             ^                                               ^
//   |    "super high"    |    "high"    |   "medium"   |    "low"    |
//   |       (1000)       |    (100)     |     (50)     |     (0)     |
//

pq.deleteHigh(); // QueueNode { _value: 'super high', _priority: 1000, ... }

//   highest priority               lowest priority
//          ^                             ^
//   |    "high"    |   "medium"   |    "low"    |
//   |    (100)     |     (50)     |     (0)     |
//

pq.deleteLow(); // QueueNode { _value: 'low', _priority: 0, ... }

//  highest priority   lowest priority
//          ^               ^
//   |    "high"    |   "medium"   |
//   |    (100)     |     (50)     |
//

pq.clear();
pq.size; // 0

Queue

import { Queue } from "@clarketm/super";

let queue = new Queue([2, 4, 6, 8]);

//   front              rear
//     ^                 ^
//  |  2  |  4  |  6  |  8  |

queue.size; // 4
queue.front; // 2
queue.rear; // 8

queue.isEmpty(); // false

queue.enqueue(10); // 5 : new size

//   front                   rear
//     ^                      ^
//  |  2  |  4  |  6  |  8  | 10 |

queue.dequeue(); // 2  : dequeued item

//   front              rear
//     ^                 ^
//  |  4  |  6  |  8  | 10 |

queue.clear();
queue.size; // 0

Set

import { Set } from "@clarketm/super";

let setA = new Set([1, 2, 3]); // Set { 1, 2, 3 }
let setB = new Set([2, 3, 4]); // Set { 2, 3, 4 }

// Use any built-in Set methods:
setA.has(1); // true

// Use custom methods:

// `isSubset`
setA.isSubset(setB); // false

// `isSuperset`
setA.isSuperset(setB); // false

// `isDisjoint`
setA.isDisjoint(setB); // false

// `union`
setA.union(setB); // Set { 1, 2, 3, 4 }

// `intersection`
setA.intersection(setB); // Set { 2, 3 }

// `difference`
setA.difference(setB); // Set { 1 }

// `symmetricDifference`
setA.symmetricDifference(setB); // Set { 1, 4 }

Trie

import { Trie } from "@clarketm/super";

let trie = new Trie(["me", "men", "go"]);

//               root
//              /   \
//            'm'    'g'
//           /         \
//    $ <- 'e'         'o' -> $
//         /
//  $ <- 'n'
//
// $: denotes a complete word
//

trie.root; // TrieNode { _char: √, ... }

trie.insert("met");

//               root
//              /   \
//            'm'    'g'
//           /         \
//    $ <- 'e'         'o' -> $
//         /  \
//  $ <- 'n'   't' -> $
//
// $: denotes a complete word
//

// `word` search w/ `contains`
trie.contains("me"); // true

// `prefix` search w/ `startsWith`
trie.startsWith("m"); // true

// Return a full Match object w/ `search`
trie.search("men");

// Match object
// {
//  query: 'men',
//  matchedChars: 3,
//  isMatch: true,
//  isCompleteWord: true,
//  node: TrieNode { ... }
// }

trie.remove("go");

//               root
//              /
//            'm'
//           /
//    $ <- 'e'
//         /  \
//  $ <- 'n'   't' -> $
//
// $: denotes a complete word
//

Data Types

Number

Math

String


Sorting Algorithms

BubbleSort

import { bubbleSort } from "@clarketm/super";

// General usage

// ascending
let sortedArray = bubbleSort([4, 3, 8, 1]); // [1, 3, 4, 8]

// Custom comparator

// descending
let sortedArray = bubbleSort([4, 3, 8, 1], (a, b) => b - a); // [8, 4, 3, 1]

// ascending (string length)
let sortedArray = bubbleSort(["111", "1", "11"], (a, b) => a.length - b.length); // ["1", "11", "111"]

// descending (string length)
let sortedArray = bubbleSort(["111", "1", "11"], (a, b) => b.length - a.length); // ["111", "11", "1"]

InsertionSort

import { insertionSort } from "@clarketm/super";

// General usage

// ascending
let sortedArray = insertionSort([4, 3, 8, 1]); // [1, 3, 4, 8]

// Custom comparator

// descending
let sortedArray = insertionSort([4, 3, 8, 1], (a, b) => b - a); // [8, 4, 3, 1]

// ascending (string length)
let sortedArray = insertionSort(["111", "1", "11"], (a, b) => a.length - b.length); // ["1", "11", "111"]

// descending (string length)
let sortedArray = insertionSort(["111", "1", "11"], (a, b) => b.length - a.length); // ["111", "11", "1"]

MergeSort

import { mergeSort } from "@clarketm/super";

// General usage

// ascending
let sortedArray = mergeSort([4, 3, 8, 1]); // [1, 3, 4, 8]

// Custom comparator

// descending
let sortedArray = mergeSort([4, 3, 8, 1], (a, b) => b - a); // [8, 4, 3, 1]

// ascending (string length)
let sortedArray = mergeSort(["111", "1", "11"], (a, b) => a.length - b.length); // ["1", "11", "111"]

// descending (string length)
let sortedArray = mergeSort(["111", "1", "11"], (a, b) => b.length - a.length); // ["111", "11", "1"]

QuickSort

import { quickSort } from "@clarketm/super";

// General usage

// ascending
let sortedArray = quickSort([4, 3, 8, 1]); // [1, 3, 4, 8]

// Custom comparator

// descending
let sortedArray = quickSort([4, 3, 8, 1], (a, b) => b - a); // [8, 4, 3, 1]

// ascending (string length)
let sortedArray = quickSort(["111", "1", "11"], (a, b) => a.length - b.length); // ["1", "11", "111"]

// descending (string length)
let sortedArray = quickSort(["111", "1", "11"], (a, b) => b.length - a.length); // ["111", "11", "1"]

SelectionSort

import { selectionSort } from "@clarketm/super";

// General usage

// ascending
let sortedArray = selectionSort([4, 3, 8, 1]); // [1, 3, 4, 8]

// Custom comparator

// descending
let sortedArray = selectionSort([4, 3, 8, 1], (a, b) => b - a); // [8, 4, 3, 1]

// ascending (string length)
let sortedArray = selectionSort(["111", "1", "11"], (a, b) => a.length - b.length); // ["1", "11", "111"]

// descending (string length)
let sortedArray = selectionSort(["111", "1", "11"], (a, b) => b.length - a.length); // ["111", "11", "1"]

License

MIT © Travis Clarke

If you find any bugs or have a feature request, please open an issue on github!

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