zip

Combine values from iterables.

Similar: cartesianProduct, zip.

function zip(xs, fm, fe, vd?)
// xs: iterables
// fm: map function (vs, i, xs)
// fe: end function (dones) [some]
// vd: default value

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

var x = [1, 2, 3];
var y = [4, 5];
[...xiterable.zip([x, y])];
// → [[1, 4], [2, 5]] (shortest)

[...xiterable.zip([x, y], ([a, b]) => a + b)];
// → [5, 7]

[...xiterable.zip([x, y], null, some)];
// → [[1, 4], [2, 5]] (shortest)

[...xiterable.zip([x, y], null, every, 0)];
// → [[1, 4], [2, 5], [3, 0]] (longest)

[...xiterable.zip([x, y], null, head, 0)];
// → [[1, 4], [2, 5], [3, 0]] (first)

References

• Data.List.zipWith: Haskell
• List-Extra.zip: elm
• _.zipWith: lodash
• zip: Python
• itertools.zip_longest: Python
• zip: Ruby