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About

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Important

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

• @thi.ng/uuid

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:

• Crypto
• SFC32
• Smush32
• System
• WrappedRandom
• Xoshiro128
• XorShift128
• XorWow
• XsAdd

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

Random distributions

• exponential()
• gaussian()
• geometric()
• normal()
• uniform()

Other utilities

• coin() / fairCoin()
• pickRandom() / pickRandomKey()
• randomBytes() / randomBytesFrom()
• randomID()
• weightedRandom() / weightedRandomKey()
• uniqueIndices() / uniqueValuesFrom()

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Installation

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Dependencies

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API

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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)