[fantispug]

> Maybe my data structure has a hash table of items, as well as a direct link to the largest item. When I say: "write the function to insert a new item in the list, and remember to update the largest item if it is larger than the current one", would Copilot do the right thing? Each step is easy in itself (adding an element to a hash, comparing an item to another one).

In general it won't solve all your problems, but it's helpful for automating simple things like this (but you still need to test edge cases). With this prompt in Python (which I'm more familiar with):

  from dataclasses import dataclass
  from typing import TypeVar
  
  T = TypeVar('T')
  
  @dataclass
  class MaxDict:
      items: dict[T, float]
      max_value_item: T

      def add_item(

It completed:

    def add_item(self, item: T, value: float):
        if value > self.items[self.max_value_item]:
            self.max_value_item = item
        self.items[item] = value

This was my second attempt; first I called it `max_item` and the completion did something about comparing the key.