Functional Geekery Episode 85 – Trisha Gee

In this episode I talk with Trisha Gee. We talk about functional programming in Java 8 and beyond, and working to introduce functional programming ideas to developers that just want to get their work done.

Our Guest, Trisha Gee

@trisha_gee on Twitter


ClojureD will be taking place on the 25th of February, 2017, in Berlin, Germany. Visit to get tickets and keep updated as more information becomes available.

BOB Konf is taking place the 24th of February 2017 in Berlin, Germany. Visit for more information about the conference.

ElixirDaze is coming up on March 2nd and 3rd. With keynotes by Prag Dave Thomas and Saša Jurić, make sure to visit for more information and to register.

Destination Code, a new unconference starting in Utah, is having its inaugural event March 27-30th, 2017. Visit to find out more.

Erlang & Elixir Factory 2017 is on the 23rd and 24th of March. Visit for more information.

The O’Reilly Software Architecture Conference will be taking place April 2-5, 2017 in New York. Visit to register and find out more, and use code USRG for 20% off most passes.

flatMap(Oslo) is a FP-conference with focus on Scala and the JVM, taking place on May 2nd and 3rd in Oslo, Norway. Please go to to learn more.

ElixirConf EU will be taking place on May 4th and 5th with tutorials on May 3rd. For more information visit:

OSCON will be taking place May 8-11 in Austin, TX. For more information and to register visit:, and use code USRG for 20% off most passes.

Elm Europe will be taking place June 8th and 9th in Paris, France. Visit for more information and to register.

EuroClojure will be taking place in Berlin, Germany on July 20th & 21st. Visit for more information and to keep updated.

If you have a conference related to functional programming, contact me, and I will be happy to announce it.

Topics [@5:29]

About Trisha
Trisha’s Lambda World presentation
How Trisha got into software
Keeping on the edge of Java
Setting the foundation for and exposure to functional features
Lambda Expression in C#
Converting Anonymous Inner Types to Lambdas
Converting `for` or `foreach` loops to Streams API
Java 8 Streams API
IntelliJ IDEA
Introducing functional ideas to non-functional developers
The failure case of functional programming
“Coming at it from a ‘This is the problem it is trying to solve'”
Easy sells for introducing functional ideas
Optional in Java 8
Logging in Java 8 to support lambda expressions
How Optional works in Java 8
“It forces the developer to think about the ramifications”
Optional changes coming in Java 9
Method References and Lambda expressions
Understanding Closures in Java
Collections API facelift that supports lambda expressions
New Comparator interface in Java 8
Working with files
“Of course I want to apply a series of transformation to each [line in a file]”
JetBrains Java Annotated Monthly
Summary of tips/advice to spread ideas to developers who are trying to get work done
Badass: Making Users Awesome by Kathy Sierra
“Lead with ‘This is why'”
Trisha’s Upcoming Conferences appearances
Voxxed CERN
QCon London
Devoxx US
Progscon London
Devoxx UK
J On The Beach
GOTO Amsterdam
Trisha’s posts on IntelliJ IDEA blog
Trisha’s posts on JetBrains Upsource blog

As always, a giant Thank You goes to David Belcher for the logo design.