def merge_arrays(array1, array2):
    merged_array = []
    index1, index2 = 0, 0

    while len(merged_array) < len(array1) + len(array2):
        if (index1 < len(array1)) and ((index2 >= len(array2)) or (array1[index1] < array2[index2])):
            merged_array.append(array1[index1])
            index1 += 1
        else:
            merged_array.append(array2[index2])
            index2 += 1

    return merged_array