mersenne-twister-serializable
v1.0.0
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A serializable Mersenne Twister
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mersenne-twister-serializable
A serializable Mersenne Twister
A modification of fast-mersenne-twister
to support serializing / deserializing (allows to save / restore the seed) and with compatibility enhancements for older browsers/environments.
Usage
const { createMersenneTwister } = require('mersenne-twister-serializable');
let twister = createMersenneTwister(1234567890);
console.log(twister.random()); // 0.6187947695143521
let state = twister.save(); // state is an Object that can be serialized to JSON
console.log(twister.random()); // 0.3405089376028627
twister.restore(state);
console.log(twister.random()); // 0.3405089376028627
let another = createMersenneTwister(state);
console.log(another.random()); // 0.3405089376028627
You can also use an array seed:
const { createMersenneTwister } = require('mersenne-twister-serializable');
let twister = createMersenneTwister([1234, 5678, 9012]);
console.log(twister.random()); // 0.22977210697717965
Methods
All of the original methods are available on the MersenneTwister object returned by the exported function.
They are also aliased to more readable / convenient names.
| Convenience | Original | Return |
| ----------- | -------- | ------ |
| randomNumber
| genrand_int32
| 32 bit integer, [0,0xffffffff] |
| random31Bit
| genrand_int31
| 31 bit integer, [0,0x7fffffff] |
| randomInclusive
| genrand_real1
| float, [0,1] |
| random
| genrand_real2
| float, [0,1) (this is just like what Math.random()
returns) |
| randomExclusive
| genrand_real3
| float, (0,1) |
| random53Bit
| genrand_res53
| float, [0,1) with 53-bit resolution |
| save
| toJSON
| serializable Object with Number n
and Array d
|
| restore
| fromJSON
| void |
Notes
- Extremely true to the original algorithm by Matsumoto & Nishimura
- Converted to JavaScript by Stephan Brumme
- This version cannot be initialized with an array
- Updated by Thomas Randolph for compliance and performance
- with all of the original random generators
- with the ability to be initialized with an array
- with the correct range (the original only outputs unsigned integers, while Stephan's version outputs signed integers)
- Updated by Jimb Esser
- with my code style
- to support saving/restoring
- to support older browsers/environments
- performance optimizations