Lists cartesian product of arrays. :package: :smiley_cat: :running: :vhs: :moon: :scroll: :newspaper: :blue_book:

Similar: cartesianProduct, zip.

This is part of package extra-array.

array.cartesianProduct(xs, [fm]);
// xs: arrays
// fm: map function (vs, i)

const array = require("extra-array");

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

array.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