pigulla / mersennetwister Goto Github PK

var randomBoolean = function (rng) // rng: an *optional* random number generator
{
    // Determine if a random number generator with .random() method was passed.
    // Subsequent rng.random() calls will be Math.random() if no rng was passed.
    if (rng === undefined || typeof rng.random !== 'function') rng = Math;

    return rng.random() >= 0.5;     // return random boolean value
}

var mt = new MersenneTwister(123);
while (randomBoolean(mt))   // use seeded generator mt
{
    console.log('this will be printed twice on every execution');
}

while (randomBoolean())     // use default Math.random()
{
    console.log('nondeterministic execution');
}