Learning Functional Programming in Go

Using mathematics and category theory to gain understanding

Let's work with something we can relate to soccer!

How can we know the position of a ball in the air as it moves from Messi's foot into the goal?

Note that due to spin on the ball and the imbalance of air pressure, when in the air, the ball may curve left to right and up and sharply down.

Check out Messi's curving goals here:

• https://www.youtube.com/embed/CmSwaK6RsB4?start=11&end=15M
• https://www.youtube.com/watch?v=rNlGmhFSkxw

Suppose we have a small soccer field with the dimensions of 50 yards X 100 yards and a net that is 8 feet tall. The height of the goal is the z dimension:

If the sun is directly overhead and makes a shadow on the field, then we can know the x, y coordinates. ...