The stories and people behind the code. Hear stories of software development from interesting people.
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Domain Driven Design And Microservices
Today I talk to Vaughn Vernon about how Domain Driven Design can help with designing microservices. The guidelines that Vaughn has developed in his work on DDD can provide guidance for where service and consistency boundaries should be drawn. We also talk about the platform he is developing for applying these DDD concepts using the actor model, Vlingo. Show Notes: Implementing DDD Book Vlingo Platform Vlingo Source
Http4s and Functional Web Development With Ross Baker
The promise of functional programming is code that is easier to reason about, test and maintain. Referential transparency means there is no extra context to worry about, we can just focus on inputs and outputs. Examples of functional programming in the small are plentiful. Fibonacci is easy to write as a function but what about fp in the large? Http4s is a web framework written in scala that takes a pure functional approach to building http services. Ross Baker is a contributor to http4s and he explains the benefits of this approach. We also touch on the benefits of working remotely, since he and I have both been doing it for some time. Links: Http4s Presentation on Http4s Today I talk with @rossabaker about http4s and the benefits of a pure functional approach to building http services
Moves and Borrowing In Rust With Jim Blandy
The surprising thing about rust is how memory management works. Rust has the concepts of moves and borrowing. If you have heard about Rust, you may have heard people talking about the borrow checker and trying to make it happy. In this interview, Jim Blandy walks us through what these concepts mean and how they work. We also talk about how to avoid fighting with the borrow checker at all and why the conceptual model that Rust adopts, though it may seem unusual at first, is actually more representative of how computers work and therefore an easier programming model.
Dependent Types in Haskell with Stephanie Weirich
At Strange loop 2017, a wandered into a talk where I saw some code that deeply surprised me. The code could have been python if you squinted, passing dictionaries around, no type annotations anywhere. Yet key look up in the dictionary was validated at compile time. It was a compile time error to access elements that didn't exist. Also the dictionary was heterogeneous, the elements had different types, and it was all inferred and validated at compile time. What I was seeing was Dependent types in Haskell. In today's interview Stephanie Weirich explains her efforts to add dependent types to haskell and how that example worked. Shows Notes: Dependent Types in Haskell Talk https://www.cis.upenn.edu/~sweirich/ https://github.com/sweirich @fancytypes Dependent Types Regex
Micro Services vs Monoliths With Jan Machacek
I don't know a lot about micro services. Like how to design them and what the various caveats and anti-patterns are. I'm currently working on a project that involves decomposing a monolithic application into separate parts, integrated together using Kafka and http. Today I talk to coauthor of upcoming book, Reactive Systems Architecture : Designing and Implementing an Entire Distributed System. If you want to learn some of the hows and whys of building a distributed system, I think you'll really enjoy this interview. The insights from this conversation are already helping me. Contact Jan Machacek is the CTO at Cake Solutions. Videos long lived micro services Book - Reactive System Architecture
Rust And Bitter C++ Developers With Jim Blandy
Rust, the programming language, seems to be really trendy these days. Trendy to me means shows up a lot on hacker news. Rust is really interesting language though, and I think the growing popularity is deserved. Today I talk with Jim Blandy, one of the authors of Programming Rust. We talk about what problems rust is trying to solve, the unique language features and type system of rust. It includes both algebraic data types, type classes, and generics. There is even a proposal somewhere for adding HKT. We also touch on why it is so hard to secure code. Jim works on Firefox and his insights into the difficulty of writing secure code are super interesting. Show notes Rust Programming Rust Book MESI protocol Constraint-based Verification of Parameterized Cache Coherence Protocols Formal Methods in System Design Rust Validation - 3d game demo - (not sure where this is, post in comments if you find it) integer overflow
Erlang And Distributed Systems with Steven Proctor
Today's interview is with Steven Proctor, the host of the functional geekery podcast. We talk about distributed programming in general and specifically how erlang supports distributed computing. We also talk about things he's learned about functional programming and applying FP principles to various non FP contexts. Contact Proctor: Functional Geekery Podcast @stevenproctor @fngeekery
Purescript And Avocados with Justin Woo
Purescript is a functional programming language that compiles to javascript. It is a strict haskell dialect that can run anywhere that javascript does. Justin Woo is a self described Purescript evangelist and enthusiast. We talk about purescript vs elm and working with expressive type systems. Justin also had some great metaphors about phantom types and masking tape as well as avacados and testing. Contact Justin: twitter github website Show notes: Purescript purescript training videos My team at Tenable is hiring. We are a distributed team of scala developers working on static analysis of docker containers (among other things). We are a team of smart people, working fairly autonomously on interesting problems. We are one of many teams working on interesting problems at Tenable. I think its a great place to work. I am in Peterborough, in Canada, and our team has people working in the US, Ireland and the UK as well. Here is the job posting: https://www.linkedin.com/jobs/view/586241797/ Tell them Adam sent you, or you can email me directly at work abell at tenable.com or use this link to apply.
FP Interview: Throw Away the Irrelevant with John A De Goes
Today's interview is with John A De Goes. We talk about performance problems with monad transformer on the jvm, various flavours of IO monads and reasoning about polymorphic type signatures. On the lighter side of things, we discuss how to write technical articles well, flame wars and Zee vs Zed pronunciation. Show Notes: John's Website and Twitter Descriptive Variable Names: A Code Smell Data Structures Are Antithetical to Functional Programming A Modern Architecture for FP
Functional Programming Interview: Total Swift Programming
In simple terms, a total function is a function that produces a well defined output for all possible inputs. A total program is a program composed of only total functions. A non-total, or partial function, would be a function that can fail given certain inputs. Such as taking the head of a list, which can fail if giving an empty list and is therefore non-total. Total programming can be done in any language, however many languages make this easier. Some, going so far as to require proof of totality. In this interview Andre Videla discusses how the swift program language encourages programming in a total style. He also discusses his love of Idris, proof assistants and how his research into haskell, idris and dependant types have made him a better swift programmer. Links: Total Programming In Swift
Functional Programming Interview: Idris, Proofs and Haskell with Edwin Brady
Edwin Brady is the creator of the Idris programming language and Author of the book Type-Driven Development with Idris and a computer science lecturer. The book, the language and Edwin himself all seem to be chock full of ideas for improving the way computer programming is done, by applying ideas from programming language theory. In this interview, we discuss dependent types, type holes, interactive and type-driven development, theorem provers, Curry–Howard correspondence, dependant haskell, total functional programming, British vs American spelling and much more. Links: The Book Idris Lectures at OPLSS Idris Language Site
Functional Programming Interview: Domain Driven Design meets Functional Programming
In object oriented languages, modeling a complex problem domain is a well understood process. Books like Domain Driven Design contain techniques for breaking down a problem domain and earlier books like the gang of four book catalogue design patterns for modeling these domains in an object oriented way. In today’s interview Debashish Ghosh explains how to model a complex problem domain in a functional paradigm. His solution focuses on modelling the behaviour of the software system rather than nouns it will contain. He also focuses on an algebraic approach to api design and discusses how abstract algebra provides tools for building better software. Episode Page Episode Transcript “I first come up with what I call the algebra of the behaviors. The algebra of the behaviors refers to the basic contract, which the behavior is supposed to support, which the behavior is supposed to honor. So that's the algebra.” -Debashish Ghosh Links: Debashish's Book