Putting the Fun in Functional - AndroidListener Chicago, October 2015

My talk on being a crazy person who decided to rebuild map, filter, and reduce functions in Java 7 so I could better understand what the hell they're doing.

And also on sandwiches.

Code be here: https://github.com/designatednerd/FunInFunctional-Android

Transcript

1. Putting the Fun* in Functional * - may depend on your definition of fun by Ellen Shapiro AndroidListener Chicago, October 2015
2. The Big 3 Functional Methods map filter reduce
4. What do these methods DO? -map: Apply the same function to everything in this collection
5. What do these methods DO? -map: Apply the same function to everything in this collection -filter: Return the things in this collection passing a test function
6. What do these methods DO? -map: Apply the same function to everything in this collection -filter: Return the things in this collection passing a test function -reduce: Combine the things in this collection with a starting value, and a function that adds things to a starting value.
10. Demo Time!
11. Don't Do What Donny Don't Did (At least if you want to be functional)
12. Side effects!
15. Question Time!
16. Links! — Sample Code: https://github.com/designatednerd/ FunInFunctional-Android
17. Photo Credits! — Sandwich photo by Molly Elliot: https:// www.flickr.com/photos/mollyelliott/4576766142 — Square peg in a round hole photo by Yoel Ben- Avraham: https://www.flickr.com/photos/epublicist/ 3546059144 — Pills by Thirteen of Clubs: https://www.flickr.com/ photos/thirteenofclubs/