randomSubset - nodef/extra-set GitHub Wiki
Pick an arbitrary subset.
Similar: randomSubset, subsets.
function randomSubset(x, n, fr)
// x: a set
// n: number of values [-1 ⇒ any]
// fr: random number generator ([0, 1))
const set = require('extra-set');
var x = new Set([1, 2, 3, 4]);
set.randomSubset(x);
// → Set(2) { 1, 3 }
set.randomSubset(x, 3);
// → Set(3) { 1, 2, 4 }
set.randomSubset(x, 2);
// → Set(2) { 2, 4 }