Function getArraysCommonPart

core/utils/arrays.ts:30–51

(...arrays: Array<T[]>)

}

export function getArraysCommonPart<T extends object>(...arrays: Array<T[]>) {
  if (arrays.length === 0) return [];
  if (arrays.length === 1) return arrays[0];

  const fromShortest = sortBy(arrays, (array) => array.length);

  const [first, ...arraysToCheck] = fromShortest;

  const remainingItems = new Set(first);

  for (const nextArray of arraysToCheck) {
    for (const remainingItem of remainingItems) {
      if (!nextArray.includes(remainingItem)) {
        remainingItems.delete(remainingItem);

        if (remainingItems.size === 0) return [];
      }
    }
  }

  return Array.from(remainingItems);
}

export function areArraysShallowEqual<T>(a: T[], b: T[]) {
  if (a === b) return true;