function selectReservoir(array, N) {
return array.sort(() => 0.5 - Math.random()).slice(0, N);
}
var array = [4, 9, 14, 96, 5, 13, 0, 3, 99, 19, 2, 80, 1, 7];
const N = 5;
const reservoir = selectReservoir(array, N);
console.log(reservoir);
/*
run:
[ 96, 14, 7, 13, 9 ]
*/