March 2019
Intermediate to advanced
208 pages
5h 11m
English
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It’s Your Turn
Write a function named discount that calculates discount prices. It should have two labeled parameters (choose any names you like):
- The original price, which is float
- The discount percent, which is also float
If the original price is, say, $30.00 and the discount percent is 5%, the amount saved is $1.50 (5% of $30.00), making the result $28.50.
Then, use currying to create functions named halfOff which uses 50 as the value for the percent, and tenPercentOff, which uses 10 as the value for the percent. Write complete type annotations on the discount function. Make sure you write code that uses these functions and displays the results so you can be sure everything works! You can see a solution at code/functions/src/Discount.re ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.