Day 3: Balancing on a Boat
On our third and final day of Factor, we will focus on data structures called tuples, and use them to create a flexible cart checkout application. We’ll see more of Factor’s sweet spot—function composition in the concatenative style—both in the checkout example and in a revisitation of the classic “FizzBuzz” programming quiz. We’ll wrap up the chapter with a few places to look to continue your exploration of Factor.
Tuples
Factor has an object system, and tuples are classes of objects for storing values into named slots. To define a class, use TUPLE: followed by the class name and the names of the slots:
| factor/examples/tuples/tuples.factor | |
| | USE: kernel |
| | |
| | IN: examples.tuples |
| | |
* | TUPLE: cart-item name price quantity ; ... |
Get Seven More Languages in Seven Weeks now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
