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@thi.ng/random

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Note

This is one of 199 standalone projects, maintained as part of the @thi.ng/umbrella monorepo and anti-framework.

🚀 Please help me to work full-time on these projects by sponsoring me on GitHub. Thank you! ❤️

About

Pseudo-random number generators w/ unified API, distributions, weighted choices, ID generation.

Important

In July 2024 this package was restructured and split-up to extract some features into smaller more focused packages:

This package provides the IRandom interface and various (mostly seedable) pseudo-random number generator implementations, incl. IRandom wrappers for Math.random() (or other external PRNGs) and window.crypto:

Partially ported from C implementations taken from c.thi.ng.

Random distributions

Other utilities

Status

STABLE - used in production

Search or submit any issues for this package

Support packages

Related packages

  • @thi.ng/ksuid - Configurable K-sortable unique IDs, ULIDs, binary & base-N encoded, 32/48/64bit time resolutions

Installation

yarn add @thi.ng/random

ESM import:

import * as rnd from "@thi.ng/random";

Browser ESM import:

<script type="module" src="https://esm.run/@thi.ng/random"></script>

JSDelivr documentation

For Node.js REPL:

const rnd = await import("@thi.ng/random");

Package sizes (brotli'd, pre-treeshake): ESM: 1.93 KB

Dependencies

Note: @thi.ng/api is in most cases a type-only import (not used at runtime)

Usage examples

18 projects in this repo's /examples directory are using this package:

Screenshot Description Live demo Source
Self-modifying, animated typographic grid with emergent complex patterns Demo Source
Probabilistic color theme generator Demo Source
Interactive inverse FFT toy synth Demo Source
2D Bezier curve-guided particle system Demo Source
Basic hiccup-based canvas drawing Demo Source
Barnsley fern IFS fractal renderer Demo Source
k-means clustering visualization Demo Source
Randomized space-filling, nested grid layout generator Demo Source
Randomized 4-point 2D color gradient image generator Demo Source
Interactive pixel sorting tool using thi.ng/color & thi.ng/pixel Demo Source
Animated, iterative polygon subdivisions & visualization Demo Source
Procedural stochastic text generation via custom DSL, parse grammar & AST transformation Demo Source
Basic usage of thi.ng/rdom keyed list component wrapper Demo Source
Generative audio synth offline renderer and WAV file export Demo Source
Evolutionary shader generation using genetic programming Demo Source
Responsive & reactively computed stacked column layout Demo Source
thi.ng/rdom & thi.ng/rstream based quiz to guess thi.ng package names Demo Source
Game of Life implemented as WebGL2 multi-pass shader pipeline Demo Source

API

Generated API docs

import { Smush32 } from "@thi.ng/random";

const rnd = new Smush32(0xdecafbad);

// the following methods are available for all generators

// next uint (0 .. 2^32-1)
rnd.int()
// 4022849029

// next float [0.0 .. 1.0)
rnd.float()
// 0.2698542904737066

// next normalized float (w/ opt scale)
// [-scale .. +scale)
rnd.norm(100)
// 57.70723665079737

// next float in given interval [min .. max)
rnd.minmax(10, 20)
// 15.295951807707537

rnd.minmaxInt(10, 20)

Authors

If this project contributes to an academic publication, please cite it as:

@misc{thing-random,
  title = "@thi.ng/random",
  author = "Karsten Schmidt",
  note = "https://thi.ng/random",
  year = 2015
}

License

© 2015 - 2024 Karsten Schmidt // Apache License 2.0