Class Prng

Deterministic pseudo-random numbers (splitmix32). Every test that needs randomness derives it from an explicit seed so a failure can be replayed.

Index

Constructors

Properties

Methods

between bool derive float int next pick shuffled string

Constructors

constructor

new Prng(seed: number): Prng
Parameters
- seed: number
Returns Prng
- Defined in prng.ts:8

Properties

`Readonly`seed

seed: number

Methods

between

between(min: number, max: number): number
Parameters
- min: number
- max: number
Returns number
integer in [min, max], both inclusive.
- Defined in prng.ts:34

bool

bool(p?: number): boolean
Parameters
- p: number = 0.5
Returns boolean
true with probability p.
- Defined in prng.ts:39

derive

derive(index: number): Prng
Parameters
- index: number
Returns Prng
an independent generator seeded from this one and index (used per trial).
- Defined in prng.ts:73

float

float(): number
Returns number
float in [0, 1).
- Defined in prng.ts:21

int

int(n: number): number
Parameters
- n: number
Returns number
integer in [0, n).
- Defined in prng.ts:26

next

next(): number
Returns number
next 32-bit unsigned integer.
- Defined in prng.ts:13

pick

pick<T>(values: readonly T[]): T
Type Parameters
- T
Parameters
- values: readonly T[]
Returns T
a random element of a non-empty array.
- Defined in prng.ts:44

shuffled

shuffled<T>(values: readonly T[]): T[]
Type Parameters
- T
Parameters
- values: readonly T[]
Returns T[]
a new array with the elements of values in random order.
- Defined in prng.ts:52

string

string(alphabet: string, minLength: number, maxLength: number): string
Parameters
- alphabet: string
- minLength: number
- maxLength: number
Returns string
a random string of [minLength, maxLength] code points drawn from alphabet (astral characters stay whole).
- Defined in prng.ts:62