cartesianProduct

Lists cartesian product of objects. 🏃 [:vhs:] 📦 🌔 📒

Similar: cartesianProduct, zip.

object.cartesianProduct(xs, [fn]);
// xs: objects
// fn: map function (v, null, null)

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))];
// [
//   [ 'd', 10 ],
//   [ 'e', 20 ],
//   [ 'd', 10 ],
//   [ 'e', 20 ],
//   [ 'd', 10 ],
//   [ 'e', 20 ]
// ]

references

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