rem - nodef/extra-number GitHub Wiki
Find the remainder of x/y with sign of x (truncated division).
function rem(x, y)
// x: dividend
// y: divisor
const xnumber = require('extra-number');
xnumber.rem(1, 10);
// → 1
xnumber.rem(-1, 10);
// → -1
xnumber.rem(1, -10);
// → 1