Tagged: monad

A daily programmer – nuts and bolts

I’ve mentioned r/dailyprogrammer in previous posts, since I think they are fun little problems to solve when I have time on my hands. They’re also great problem sets to do when learning a new language.

This time around I decided to do an easy one with haskell.

Nuts and bolts problem description

The goal is stated as:

You have just been hired at a local home improvement store to help compute the proper costs of inventory. The current prices are out of date and wrong; you have to figure out which items need to be re-labeled with the correct price.

You will be first given a list of item-names and their current price. You will then be given another list of the same item-names but with the correct price. You must then print a list of items that have changed, and by how much.

The formal inputs and outputs:… Read more