stringcompression

String compression is the process of reducing the size of text data to optimize storage space or transmission.

Install

npm install stringcompression

Functions

The following functions are available:

• encodeKeys(input): Encodes the keys in the input text using a predefined dictionary. Words in the input that match a key in the dictionary are replaced with a caret symbol (^) followed by the corresponding key.

• decodeKeys(input): Decodes the keys in the input text using a predefined dictionary. Words in the input that start with a caret symbol (^) followed by a key are replaced with the corresponding value from the dictionary.

• compressIt(input): Performs a series of encoding operations on the input text. It applies the Burrows-Wheeler Transform (BWT), Move-to-Front (MTF) encoding, Elias Gamma Coding (EGC), and Bijective Ternary Transformation (BTT) using the provided keys and dictionary.

• decompressIt(input): Performs a series of decoding operations on the input code. It reverses the encoding operations applied by the encodeIt function using the provided keys and dictionary.

Usage

To use these functions in your JavaScript code, you can require the module and call the desired functions:

const { encodeKeys, decodeKeys, compressIt, decompressIt } = require('stringcompression');

// see example.js to learn how to combine both

// perform dictionary compress - Experimental

const encoded = encodeKeys('Hello, world!');
console.log(encoded); // Outputs: 'Hello, ^WRUJ^RBT^'

const decoded = decodeKeys('Hello, ^WRUJ^RBT^');
console.log(decoded); // Outputs: 'Hello, world!'

// perform dynamic compress - Stable

const encodedText = compressIt('Hello, world!');
console.log(encodedText); // Outputs: encoded text

const decodedText = decompressIt(encodedText);
console.log(decodedText); // Outputs: 'Hello, world!'

Results