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sb-js-data-structures

v1.0.8

Published

JavaScript Data Structure written in TypeScript

Vulnerabilities

Powered byPowered by Snyk
  • 0High
  • 0Medium
  • 0Low

Links

Git

Maintainers

sambarrossambarros

Keywords

data structurelinked listdoubly linked listbstbinary search treetreegraphedgequeuemaphashhash tablesorted liststack

Readme

Data Structures

JavaScript Data Structure written in TypeScript

Summary

Installation and Usage

Server-side:

Using npm:

npm install sb-ds-data-structures

Then where needed:

Typescript

import { LinkedList } from 'sb-js-data-structures'

const list = new LinkedList()

list.addToLast(1)
list.addToLast(2)

Documentation

Linked List

Creates a Linked List, a data structure where each element is a separate object and the elements are linked using pointers.

Initializer

import { LinkedList } from 'sb-js-data-structures'

const list = new LinkedList()

Methods

addToLast
public addToLast(element: T): void
Parameters
  • element T - The element to be inserted
Description

Inserts an element in the ending of the Linked List.

addToHead
public addToHead(element: T): void
Parameters
  • element T - The element to be inserted
Description

Inserts an element in the beginning of the Linked List.

addElementAtPosition
public addElementAtPosition(element: T, position: number): void
Parameters
  • element T - The element to be inserted
  • position number - position where the element should be inserted
Description

Inserts an element in a specific position of the Linked List, since position is less then the number of elements of the Linked List.

removeFromLast
public removeFromLast(): void
Description

Removes the element from the ending of the Linked List.

removeFromHead
public removeFromHead(): void
Description

Removes the element from the beginning of the Linked List.

removeFirstElementFoundFromList
public removeFirstElementFoundFromList(element: T): void
Parameters
  • element T - The element to be removed
Description

Removes the first element found in the Linked List.

removeAllElementsFromList
public removeAllElementsFromList(element: T): void
Parameters
  • element T - The element to be removed
Description

Removes all the elements found in the Linked List.

reverse
public reverse(): void
Description

Reverse the Linked List.

fromArray
public fromArray(element: T[]): void
Parameters
  • elements T[] - Array of elements
Description

Inserts all the elements at the ending of the Linked List.

toArray
public toArray(): T[]
Description

Creates an array with all the elements of the Linked List.

getLength
public getLength(): number
Returns
  • number - Linked List length.
Description

Gets the length of the Linked List.

isEmpty
public isEmpty(): boolean
Returns
  • boolean - Returns true if the Linked List has no elements, otherwise, returns false.
Description

Informs if the Linked List is empty.

print
public isEmpty(): boolean
Description

Display the Linked List elements.

Sorted List

Creates a Sorted List, a data structure where each element is a separate object, the elements linked using pointers and the elements are sorted.

Initializer

import { SortedList } from 'sb-js-data-structures'

const list = new SortedList()

Methods

add
public add(element: T): void
Parameters
  • element T - The element to be inserted
Description

Inserts an element in the Sorted List.

removeFromLast
public removeFromLast(): void
Description

Removes the element from the ending of the Sorted List.

removeFromHead
public removeFromHead(): void
Description

Removes the element from the beginning of the Sorted List.

removeFirstElementFoundFromList
public removeFirstElementFoundFromList(element: T): void
Parameters
  • element T - The element to be removed
Description

Removes the first element found in the Sorted List.

removeAllElementsFromList
public removeAllElementsFromList(element: T): void
Parameters
  • element T - The element to be removed
Description

Removes all the elements found in the Sorted List.

fromArray
public fromArray(element: T[]): void
Parameters
  • elements T[] - Array of elements
Description

Inserts all the elements at the ending of the Sorted List.

toArray
public toArray(): T[]
Description

Creates an array with all the elements of the Sorted List.

getLength
public getLength(): number
Returns
  • number - Sorted List length.
Description

Gets the length of the Sorted List.

isEmpty
public isEmpty(): boolean
Returns
  • boolean - Returns true if the Sorted List has no elements, otherwise, returns false.
Description

Informs if the Sorted List is empty.

print
public isEmpty(): boolean

Doubly Linked List

Creates a Doubly Linked List, a data structure where each element is a separate object and the elements linked using pointers to the next and the previous node.

Initializer

import { DoublyLinkedList } from 'sb-js-data-structures'

const list = new DoublyLinkedList()

Methods

insertToHead
public insertToHead(element: T): void
Parameters
  • element T - The element to be inserted
Description

Inserts an element in the beginning of the Doubly Linked List.

insertToTail
public insertToTail(element: T): void
Parameters
  • element T - The element to be inserted
Description

Inserts an element in the ending of the Doubly Linked List.

insertAtPosition
public insertAtPosition(element: T, position: number): void
Parameters
  • element T - The element to be inserted
  • position number - position where the element should be inserted
Description

Inserts an element in a specific position of the Doubly Linked List, since position is less than the number of elements of the Doubly Linked List.

deleteFromHead
public deleteFromHead(): void
Description

Deletes an element in the beginning of the Doubly Linked List.

deleteFromTail
public deleteFromTail(): void
Description

Deletes an element in the ending of the Doubly Linked List.

deleteFirstFound
public deleteFirstFound(element: T): void
Parameters
  • element T - The element to be deleted
Description

Deletes the element found in the Doubly Linked List.

deleteAllFound
public deleteAllFound(element: T): void
Parameters
  • element T - The element to be deleted
Description

Deletes all the elements found in the Doubly Linked List.

displayForward
public displayForward(): void
Description

Displays all elements in the Doubly Linked List from the first to the last element.

displayBackward
public displayBackward(): void
Description

Displays all elements in the Doubly Linked List from the last to the first element.

search
public search(element: T): number
Parameters
  • element T - The element to be searched
Returns
  • number - returns the position found or -1 if the element doesn't exist on the list.
Description

Searches the element in the Doubly Linked List.

fromArray
public fromArray(element: T[]): void
Parameters
  • elements T[] - Array of elements
Description

Inserts all the elements at the ending of the Doubly Linked List.

getLength
public getLength(): number
Returns
  • number - Doubly Linked List length.
Description

Gets the length of the Doubly Linked List.

isEmpty
public isEmpty(): boolean
Returns
  • boolean - Returns true if the Doubly Linked List has no elements, otherwise, returns false.
Description

Informs if the Doubly Linked List is empty.

Queue

Creates a Queue, a first-in-first-out (FIFO) data structure. In a FIFO data structure, the first element added to the queue will be the first one to be removed.

Initializer

import { Queue } from 'sb-js-data-structures'

const queue = new Queue()

Methods

enqueue
public enqueue(element: T): void
Parameters
  • element T - The element to be inserted
Description

Inserts an element in the Queue.

dequeue
public dequeue(): void
Description

Removes an element from the Queue.

peek
public peek(): void
Description

Gets the element at the front of the Queue without removing it.

getLength
public getLength(): number
Returns
  • number - Queue length.
Description

Gets the length of the Queue.

isEmpty
public isEmpty(): boolean
Returns
  • boolean - Returns true if the Queue has no elements, otherwise, returns false.
Description

Informs if the Queue is empty.

Stack

Creates a Stack, a last-in-first-out (LIFO) data structure. In a LIFO data structure, the last element added to the stack will be the first one to be removed.

Initializer

import { Stack } from 'sb-js-data-structures'

const stack = new Stack()

Methods

push
public push(element: T): void
Parameters
  • element T - The element to be inserted
Description

Inserts an element in the Stack.

pop
public pop(): void
Description

Removes an element from the Stack.

peek
public peek(): void
Description

Gets the last element at the Stack without removing it.

getLength
public getLength(): number
Returns
  • number - Stack length.
Description

Gets the length of the Stack.

isEmpty
public isEmpty(): boolean
Returns
  • boolean - Returns true if the Stack has no elements, otherwise, returns false.
Description

Informs if the Stack is empty.

Hash Table

Creates a Hash Table, a data structure that stores in an array format, where each data value has its own unique index value.

Initializer

import { HashTable } from 'sb-js-data-structures'

const hash = new HashTable()

Methods

insert
public insert(key: string, value: T): void
Parameters
  • key string - The key
  • value T - The value to be inserted
Description

Inserts an element in the Hash Table.

delete
public delete(key: string): void
Parameters
  • key string - The key
Description

Removes an element from the Hash Table.

search
public search(key: string): void
Parameters
  • key string - The key
Description

Searches an element in a hash table.

Binary Search Tree

Creates a Binary Search Tree, a last-in-first-out (LIFO) data structure. In a LIFO data structure, the last element added to the tree will be the first one to be removed.

Creates a Binary Search Tree, a data structure that is a tree in which all the nodes follow: (1) The value of the key of the left sub-tree is less than the value of its parent (root) node's key; (2) The value of the key of the right sub-tree is greater than or equal to the value of its parent (root) node's key.

Initializer

import { BinarySearchTree } from 'sb-js-data-structures'

const tree = new BinarySearchTree()

Interfaces

INode
export interface INode<T> {
  element: T
  right: INode<T> | null
  left: INode<T> | null
}

Methods

insert
public insert(element: T): void
Parameters
  • element T - The element to be inserted
Description

Inserts an element in the Binary Search Tree.

delete
public delete(element: T): void
Parameters
  • element T - The element to be removed
Description

Removes an element from the Binary Search Tree.

search
public search(element: T): INode
Parameters
  • element T - The element to be searched
Description

Gets the last element at the Binary Search Tree without removing it.

Returns
  • INode - The node found.
getLength
public getLength(): number
Returns
  • number - Binary Search Tree length.
Description

Gets the number of elements of the Binary Search Tree.

isEmpty
public isEmpty(): boolean
Returns
  • boolean - Returns true if the Binary Search Tree has no elements, otherwise, returns false.
Description

Informs if the Binary Search Tree is empty.

fromArray
public fromArray(element: T[]): void
Parameters
  • elements T[] - Array of elements
Description

Inserts all the elements in the Binary Search Tree.

License

MIT