Functional Geekery Episode 97 – Colin Barrett

In this episode I talk with Colin Barrett. We talk his intro to Objective C; exploration to Haskell, OCaml, and other languages; diving deep into functional programming; functional Swift; and more.

Our Guest, Colin Barrett

@cbarrett on Twitter

Conference Announcements

Curry On Barcelona will be taking place June 19-20th. For more information, visit

Scala Wave 2017 will be taking place July 7th and 8th. Visit to find out more and to register.

O’Reilly Fluent Conference will be taking place June 19–22, 2017 in San Jose, California. Visit to find out more and to register, and use code USRG for 20% off.

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

BusConf will be taking place the 3rd-5th of August in Frankfurt, Germany. Registration is open, and more information can be found at

The Strange Loop coming! It will be held in St. Louis, MO on September 28-30, 2017 at the Peabody Opera House. To submit your CfP, visit

PWLConf 2017 will be taking place September 28th in St. Louis, MO, before Strange Loop. Visit for more information and to stay updated on latest announcements.

Open FSharp will be taking place the 28th-29th of September in San Francisco, California. Visit for more information and to register.

LambdaWorld will be taking place in Cadiz, Spain on October 26th and 27th. For more information visit and to keep updated visit

CodeMesh is coming up November 8th and 9th in London. For more information, and to keep an eye open for registration, visit

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


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Functional Geekery now has a Patreon Page.

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Topics [@5:33]

About Colin
How Colin first got exposed to software development
First exposures to programming languages
Objective C
C and C++
Looking into Haskell, OCaml, Ruby and other languages
Getting into Haskell
Going Broad vs Going Deep
Seven Languages in Seven Weeks
Colin’s experience getting started with Haskell
“Depending on the angle you come at it, you either bounce off, or get hooked”
Real World Haskell
Taking lessons back out of Haskell
Blocks in Python and Objective C
Uncanny Valley of functional programming in Objective C
Getting deep into functional programming and functional reactive programming
Conal Elliott
Itai Ferber
Swift Evolution List
Smart KeyPaths
Digging into Swift
The dream of a ML family language with Objective C inter-op
Reactive Cocoa
What is the power of Swift vs Objective C?
“Separating out what to do from how to do it”
Swift compared to Haskell or an ML running server side
Recommendations for introducing more functional Swift
Kickstarter libraries
Kickstarter Prelude
Kickstarter mobile apps open sourced
Kickstarter iOS app
Functional Swift Conferences
Theorems for free!
Propositions as Types
Structure and Interpretation of Computer Programs
Compose Conference
Upcoming plans for a Front-end Functional meetup in NYC
Brandon Williams

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