Function isDeep

src/sort.ts:70–72

(t: Sort)

}

function isDeep(t: Sort): t is ReadonlyArray<readonly [string, SortDirection]> {
  return Array.isArray(t) && Array.isArray(t[0]);
}

function isMap(t: Sort): t is ReadonlyMap<string, SortDirection> {
  return t instanceof Map && t.size > 0;