@rollup/plugin-dsv

@iterables/zip

Combine iterables into a list of tuples, where the Nth tuple is comprised of the Nth element from each iterable.

const zip = require('@iterables/zip')

const iter = zip('abc', [1, 2, 3], 'xyz')

console.log(Array.from(iter)) // [['a', 1, 'x'], ['b', 2, 'y'], ['c', 3, 'z']]

const map = new Map()
map.set('a', 3)
map.set('b', 0)

console.log(...zip(...map)) // ['a', 'b'] [3, 0]
console.log(...zip.longest(9999)([1,2], [1,2,3])) // [1, 1] [2, 2] [9999, 3]

Installation

$ npm install --save @iterables/zip

API

zip(...iterables) -> Iterator<Array<T>>

• iterables: any Iterator — a generator instance, Array, Map, String, or Set

Returns a zipped iterator. If iterables are of different lengths, the resulting iterator will be the same length as the shortest iterable.

zip.longest(fill) -> Generator

• fill: a value to fill

Returns a zipped iterator. If iterables are of different lengths, the resulting iterator will be the same length as the longest iterable. Missing values from the shorter iterables will be replaced with fill.

License

MIT