Function findCommonItems

packages/diff-sequences/src/__tests__/index.property.test.ts:15–28

(a: Array<string>, b: Array<string>)

  fc.string({maxLength: 1, minLength: 1, unit: 'grapheme-ascii'});

const findCommonItems = (a: Array<string>, b: Array<string>): Array<string> => {
  const array: Array<string> = [];
  diff(
    a.length,
    b.length,
    (aIndex: number, bIndex: number) => a[aIndex] === b[bIndex],
    (nCommon: number, aCommon: number) => {
      for (; nCommon !== 0; nCommon -= 1, aCommon += 1) {
        array.push(a[aCommon]);
      }
    },
  );
  return array;
};

const extractCount = (data: Array<string>): Map<string, number> => {
  const countPerChar = new Map<string, number>();