8.1.5 Manipulating 2d Arrays Free May 2026

def combine(arr): result = [] for row in arr: for item in row: result.append(item) return " ".join(result)

public static String combine(String[][] arr) { StringBuilder sb = new StringBuilder(); for (int row = 0; row < arr.length; row++) { for (int col = 0; col < arr[row].length; col++) { sb.append(arr[row][col]); if (!(row == arr.length - 1 && col == arr[row].length - 1)) { sb.append(" "); } } } 8.1.5 manipulating 2d arrays

Or using StringBuilder for efficiency:

String[][] words = { {"I", "love", "coding"}, {"Java", "is", "fun"}, {"Let's", "put", "it", "together"} }; Expected output: def combine(arr): result = [] for row in