cartesianProduct - nodef/extra-object GitHub Wiki
List cartesian product of objects.
Similar: cartesianProduct, zip.
function cartesianProduct(xs, fm)
// xs: objects
// fm: map function (vs)
const object = require('extra-object');
var x = {a: 1, b: 2, c: 3};
var y = {d: 10, e: 20};
[...object.cartesianProduct([x, y])];
// → [
// → { a: 1, d: 10 },
// → { a: 1, e: 20 },
// → { b: 2, d: 10 },
// → { b: 2, e: 20 },
// → { c: 3, d: 10 },
// → { c: 3, e: 20 }
// → ]
[...object.cartesianProduct([x, y], a => object.max(a))];
// → [ 10, 20, 10, 20, 10, 20 ]