cartesianProduct

List cartesian product of iterables.

Similar: cartesianProduct, zip.

function cartesianProduct(xs, fm)
// xs: iterables
// fm: map function (vs, i)

const xiterable = require('extra-iterable');

var x = [1, 2, 3];
var y = [10, 20, 30];
[...xiterable.cartesianProduct([x, y])];
// → [
//   [1, 10], [1, 20],
//   [1, 30], [2, 10],
//   [2, 20], [2, 30],
//   [3, 10], [3, 20],
//   [3, 30]
//]

[...xiterable.cartesianProduct([x, y], ([a, b]) => a + b)];
// → [
//   11, 21, 31, 12, 22,
//   32, 13, 23, 33
//]

References

• Data.Set.cartesianProduct: Haskell
• List-Extra.cartesianProduct: elm
• itertools.product: Python
• Guava.Lists: Java
• fast-cartesian-product: @fisker
• cartesian-product: @izaakschroeder
• cartesian: @alexindigo