random-shuffle

The shuffling algorithm that DOES NOT use Math.random()

This algorithm uses the crypto package which makes use of /dev/random and /dev/urandom. Having a hardware rng will produce a better source of entropy, but is not required.

Two public functions are exposed: getRand(range) and shuffle(arr).

getRand(range) returns a random integer from [0, range)

shuffle(arr) shuffles the passed in array in-place. The array can contain elements of any type (or multiple types).

Example:

var rs = require("random-shuffle");

var arr = [123, "abc", {"field": "value"}];

// shuffle an array

rs.shuffle(arr); // may return ["abc", {"field": "value"}, 123]

// or generate random numbers

rs.getRand(10); // may return 4