Homework Hacks 3.10

3.10.3 Python Hacks

• Create a program that lets users manage a list of their choosing.
• Users can add elements, remove them, check if an element exists, and display the current list.
• A function that can find the maximum and minimum value of a list using iteration.

# Step 1: Create a function that adds an element to the list
def add_element(list, element):
    # Step 2: Add the element to the list
    list.append(element)

    # Step 3: Return the updated list
    return list

# Step 4: Create a function that removes an element from the list
def remove_element(list, element):
    # Step 5: Remove the element from the list
    list.remove(element)

    # Step 6: Return the updated list
    return list

# Step 7: Create a function that checks if an element exists in the list
def check_element(list, element):
    # Step 8: Check if the element exists in the list
    if element in list:
        return True
    else:
        return False

# Step 9: Create a function that returns the maximum value in the list
def find_max(list):
    # Step 10: Initialize a variable to store the maximum value
    max_value = list[0]

    # Step 11: Loop through the list and update the maximum value if a larger value is found
    for element in list:
        if element > max_value:
            max_value = element

    # Step 12: Return the maximum value
    return max_value

# Step 13: Create a function that returns the minimum value in the list
def find_min(list):
    # Step 14: Initialize a variable to store the minimum value
    min_value = list[0]

    # Step 15: Loop through the list and update the minimum value if a smaller value is found
    for element in list:
        if element < min_value:
            min_value = element

    # Step 16: Return the minimum value
    return min_value

# Step 17: Display the list
def display_list(list):
    print(list)

# Step 18: Create a list of numbers
numbers = [1, 2, 3, 4, 5]

# Step 19: Add an element to the list
add_element(numbers, 6)

# Step 20: Remove an element from the list
remove_element(numbers, 3)

# Step 21: Check if an element exists in the list
print(check_element(numbers, 3)) # True
print(check_element(numbers, 6)) # False

# Step 22: Find the maximum value in the list
print(find_max(numbers)) # 5

# Step 23: Find the minimum value in the list
print(find_min(numbers)) # 1

• It’s time to go shopping! Try to create a program that allows users to manage items using an array, which can be visually represented with a shopping cart.
• While not necessary, feel free to show the cart filling up with icons (items) as the user adds or subtracts items.

const cart = {
  items: [],
  total: 0,
  addItem(item, amount) {
    // Step 2: Add the item to the cart
    this.items.push(item);
    item.quantity = amount ? amount : 0;

    this.total += item.price;
  },
  removeItem(item) {
    // Step 3: Remove the item from the cart
    this.items.splice(this.items.indexOf(item), 1);

    this.total -= item.price;
  },
  displayCart() {
    // Step 4: Display the cart
    console.log(`Total: ${this.total}`);
    console.log(`Items: `, this.items);
  },
};

// Step 5: Create an item object
const apple = {
  name: 'Apple',
  price: 0.99,
};

// Step 6: Add an item to the cart
cart.addItem(apple);

cart.displayCart();

// Step 7: Remove an item from the cart
cart.removeItem(apple);

cart.displayCart();