js-fns/intersection/index.mjs

Modern JavaScript utility library focused on the build size

/**
 * @internal
 */

/**
 * @internal
 */

/**
 * @internal
 */

/**
 * @internal
 */

/**
 * Creates an array with elements present in all given arrays.
 *
 * @param arrays - The array of arrays of elements to get elements from
 * @returns An array with elements present in all given arrays
 *
 * @public
 */

/**
 * @category Array
 * @internal
 */
export default function intersection() {
  for (
    var _len = arguments.length, arrays = new Array(_len), _key = 0;
    _key < _len;
    _key++
  ) {
    arrays[_key] = arguments[_key]
  }

  var sets = arrays.map(function (array) {
    return new Set(array)
  })
  var biggestArray = arrays.sort(function (a, b) {
    return a.length - b.length
  })[0]
  if (!biggestArray || !biggestArray.length) return []
  return biggestArray.filter(function (element) {
    return sets.every(function (set) {
      return set.has(element)
    })
  })
}