markdown-it-blockquote-cite/src/util/index.js

A markdown-it plugin that handles attributions in blockquotes with <cite> tags.

// Thanks
// https://stackoverflow.com/a/15030117/1870317

export function flatten(arr) {
  return arr.reduce((flat, toFlatten) => (
    flat.concat(Array.isArray(toFlatten) ? flatten(toFlatten) : toFlatten)
  ), []);
}

export function zip(array1, array2) {
  return array1.map((element, index) => [element, array2[index]]);
}