Build a Shopping Cart | Dataford Interview Questions

Build a basic shopping cart system that can handle a few functional requirements. Implement process_cart(prices, operations), where prices maps item names to integer prices and operations applies add, update, or remove actions. Return {"items": ..., "total": ...}, with items ordered lexicographically and total calculated from the final quantities. Add increases quantity, update replaces it, update with zero removes the item, and remove deletes it.

Constraints

1 <= len(prices) <= 1000
0 <= len(operations) <= 1000
Each price is a non-negative integer
Each operation is valid and references an item in prices
Add and update quantities are non-negative integers
Item names are strings

Function Signature

def process_cart(prices, operations):

Your question is Build a Shopping Cart. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Constraints

1 <= len(prices) <= 1000
0 <= len(operations) <= 1000
Each price is a non-negative integer
Each operation is valid and references an item in prices
Add and update quantities are non-negative integers
Item names are strings

Function Signature

def process_cart(prices, operations):

Your question is Build a Shopping Cart. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.