Js-randomize NPM

js-randomize

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⚠️ Breaking Changes in Version 2.0.0
Version 2.0.0 of js-randomize introduces breaking changes. Please refer to the CHANGELOG for details on what has changed and how to adapt your code.

Overview

js-randomize is a lightweight TypeScript library that provides utility functions for generating random integers, floats, booleans, arrays, and strings. It supports custom random number generators and is perfect for applications like games, testing, or simulations.

Installation

To install using pnpm:

pnpm add js-randomize

Or, using npm:

npm install js-randomize

Usage

Importing

Since the package is now ESM-only, use the import syntax to include it in your project:

import { Randomize } from 'js-randomize';

const randomize = new Randomize(); // Use the default Math.random() or pass a custom random generator

Generating Random Integers

const randomInt = randomize.integer(1, 10);
// randomInt is an integer between 1 and 10 (inclusive)

Generating Random Floats

const randomFloat = randomize.float(0, 1, 3);
// randomFloat is a float between 0 and 1 with 3 decimal places

Generating an Array of Random Integers

const randomIntArray = randomize.intArray(5, 1, 100);
// randomIntArray is an array of 5 random integers between 1 and 100

Generating an Array of Random Floats

const randomFloatArray = randomize.floatArray(5, 0, 1, 2);
// randomFloatArray is an array of 5 random floats between 0 and 1 with 2 decimal places

Generating a Random Boolean

const randomBool = randomize.boolean();
// randomBool is either true or false

Picking a Random Element from an Array

const array = ['apple', 'banana', 'cherry'];
const randomElement = randomize.pick(array);
// randomElement is a random item from the array

Sampling Multiple Non-Repeating Elements from an Array

const randomSample = randomize.sample(array, 2);
// randomSample contains 2 random non-repeating items from the array

Shuffling an Array

const shuffledArray = randomize.shuffle(array);
// shuffledArray is a shuffled version of the original array

Generating a Random String

const randomString = randomize.string(8);
// randomString is a random 8-character string (alphanumeric by default)

Using a Custom Random Generator

You can also provide a custom random generator function:

const customRandomFn = () => 0.5;
const customRandomize = new Randomize(customRandomFn);

const randomInt = customRandomize.integer(1, 10);
// With the custom random function, the result will always be 5

TypeScript Usage

import { Randomize } from 'js-randomize';

const randomize = new Randomize();
const randomInt: number = randomize.integer(1, 10);

Contributing

Pull requests are welcome! For major changes, please open an issue first to discuss what you'd like to change. Make sure to update tests as appropriate.