# zipWith Combines multiple arrays into a single array using a custom combiner function. This function takes multiple arrays and a combiner function, and returns a new array where each element is the result of applying the combiner function to the corresponding elements of the input arrays. ## Signature ```typescript function zipWith(arr1: T[], combine: (item: T) => R): R[]; function zipWith(arr1: T[], arr2: U[], combine: (item1: T, item2: U) => R): R[]; function zipWith(arr1: T[], arr2: U[], arr3: V[], combine: (item1: T, item2: U, item3: V) => R): R[]; function zipWith( arr1: T[], arr2: U[], arr3: V[], arr4: W[], combine: (item1: T, item2: U, item3: V, item4: W) => R ): R[]; ``` ### Parameters - `arr1` (`T[]`): The first array to zip. - `arr2` (`U[]`, optional): The second array to zip. - `arr3` (`V[]`, optional): The third array to zip. - `arr4` (`W[]`, optional): The fourth array to zip. - `combine` (`(item1: T, item2: U, item3: V, item4: W) => R`): The combiner function that takes corresponding elements from each array and returns a single value. ### Returns (`R[]`): A new array where each element is the result of applying the combiner function to the corresponding elements of the input arrays. ## Examples ```typescript // Example usage with two arrays: const arr1 = [1, 2, 3]; const arr2 = [4, 5, 6]; const result = zipWith(arr1, arr2, (a, b) => a + b); // result will be [5, 7, 9] // Example usage with three arrays: const arr1 = [1, 2]; const arr2 = [3, 4]; const arr3 = [5, 6]; const result = zipWith(arr1, arr2, arr3, (a, b, c) => `${a}${b}${c}`); // result will be ['135', '246'] ```