seed

You can also instantiate your own instance of RandBox with a known seed. This is useful for creating repeatable results.


var chance1 = new RandBox(12345);
var chance2 = new RandBox(12345);
 
// These yield the same values, in sequence
console.log(chance1.random());
console.log(chance2.random());

Since both copies of RandBox had the same seed, they will both generate the same random number sequence each time they’re called.

This allows for repeatability, if desired.

This is possible because RandBox is built atop a Mersenne Twister , a pseudo-random number generator which produces repeatable results given the same seed.

Optionally provide the seed as a string.


var chance1 = new RandBox("foo");
var chance2 = new RandBox("bar");
 
// These will be different
console.log(chance1.random());
console.log(chance2.random());

Optionally provide multiple arguments as the seed.


var chance1 = new RandBox("hold", "me", "closer");
var chance2 = new RandBox("tony", "danza");
var chance3 = new RandBox("hold", "me", "closer");
 
// These will be different
console.log(chance1.random());
console.log(chance2.random());
 
// This will be the same as the value from chance1 above
console.log(chance3.random());