Array Wrapper

To solve this coding challenge, we need to create a class,

ArrayWrapper

, that supports certain operations on arrays of integers. Specifically, the class should allow for summation of two instances of the class and ensure a specific string representation of an instance. Here is an extremely detailed explanation:

Explanation

1. Class Initialization : The class should be initialized with an array of integers. This can be handled by the constructor (or initializer method). Upon creating an instance of
   ArrayWrapper
   , the array should be stored within the object.
2. Addition Operation : When two instances of
   ArrayWrapper
   are added together using the
   +
   operator, the result should be the sum of all the elements in both arrays. This can be achieved by overriding the method responsible for object addition (typically, this can be called
   valueOf
   ,
   __add__
   , or something equivalent depending on the pseudocode).
3. String Representation : When the
   String()
   function (or equivalent method like
   toString
   or
   __str__
   ) is called on an instance of
   ArrayWrapper
   , it should return a string that looks like a comma-separated list of the array's values enclosed in square brackets.
To make this work, we will use two main methods:
4. A method for handling the sum operation when two instances are added.
5. A method for transforming the instance to its string representation.

Detailed Steps in Pseudocode

Initialization

6. Create a constructor for the class.
7. Store the input array within the instance of the class.

Overloading the Addition Operation

8. Define a method to handle addition.
9. This method should take another instance of
   ArrayWrapper
   as a parameter.
10. Retrieve the arrays from both instances.
11. Sum the elements in both arrays.
12. Return the total sum.

String Representation

13. Define a method for conversion to a string.
14. Convert the internal array to a comma-separated string within brackets.
15. Return this string.

Pseudocode

                                            
# Class definition for ArrayWrapper
Class ArrayWrapper:
# Constructor to store the initial array
Function __init__(self, numbers):
# Store the provided array in the instance variable
self.array = numbers

# Method to handle addition of two ArrayWrapper instances
Function add(self, other):
# Retrieve the arrays from both instances
array1 = self.array
array2 = other.array
# Initialize sum
total_sum = 0
# Loop through the first array and sum the elements
for element in array1:
total_sum = total_sum + element
# Loop through the second array and sum the elements
for element in array2:
total_sum = total_sum + element
# Return the total sum
return total_sum

# Method to convert the instance to a string
Function to_string(self):
# Initialize an empty string
result = ""
# Loop through each element in the array
for index in range(length(self.array)):
# Append the element to the result string
result = result + str(self.array[index])
# Add a comma after each element except the last one
if index < length(self.array) - 1:
result = result + ","
# Enclose the result string in square brackets
result = "[" + result + "]"
# Return the result string
return result

                                        

Step-by-Step Explanation:

16. Constructor (
    __init__
    ) :
• The
  __init__
  method takes an input array and stores it in
  self.array
  for the instance.
17. Addition Method (
    add
    ) :
• This method is designed to handle the addition of two
  ArrayWrapper
  instances.
• It starts by retrieving the arrays from both instances (current instance and another instance).
• It initializes
  total_sum
  to zero.
• It then iterates through each element of the first array to calculate the sum.
• Similarly, it iterates through each element of the second array and continues summing.
• Finally, it returns the
  total_sum
  .
18. String Method (
    to_string
    ) :
• This method is responsible for converting the array instance to its string representation.
• It initializes an empty string
  result
  .
• It iterates over the array, appending each element to
  result
  while adding commas where necessary.
• It then encloses
  result
  in square brackets to match the required format.
• Finally, it returns the resulting string.

By following these structured steps and using the provided pseudocode, you will be able to implement a class that meets the given challenge requirements effectively.