~/talks

Scott Wlaschin

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linkedin:scottwlaschin

github:le-swlaschin(unverified)

what they talk about

all 8 in the filters

where they keep going back

NDC London8 editions2017–2025
NDC Oslo5 editions2016–2020
DotNext Moscow2 editions2019–2021

all 8 in the filters

on a stage with

never shared a talk

who talks about the same things

title	conference	date
Thirteen ways of looking at a Turtle	NDC London 2025	2025-01-27
Thirteen different F# implementations of a turtle graphics API appear, each making a concrete tradeoff: 13 implementations delivered in ~4 minutes each, from… Talk on
Moving IO to the edges of your app: Functional Core, Imperative Shell	NDC London 2024	2024-01-29
Argues to keep all non-deterministic I/O at the perimeter and make business logic a pure, testable core that returns explicit decision types; demonstrates C#… Talk on
Pipeline-oriented programming	NDC Porto 2023	2023-10-16
Compares C# LINQ and F# pipelines and shows concrete code: implements a generic pipe extension helper with overloads for 1–n parameters, three demos (Roman… Talk on
Building confidence in concurrent code with a model checker	NDC London 2023	2023-01-23
Demonstrates using TLA+ / TLC to model-check concurrency: a count-to-three model reveals a deadlock reached until a loop (stuttering) and weak fairness are… Talk on
Domain Modeling Made Functional	DevTernity 2022	2022-12-08
Shows concrete F# code that models domains as types: F# discriminated unions for choices, option types instead of null, and wrapper types that enforce… Talk on
Pipeline-oriented programming	DotNext 2021 Moscow	2021-10-21
Argues that moving data through small, one-input/one-output stages enforces single-responsibility and open‑closed design, using LINQ and F# pipes and a tiny C#… Talk on
Experience Report: Domain Modeling with F# (short talk)	ML 2021	2021-08-26
Argues that F# serves as a practical replacement for COBOL/Java for business domain modeling by using algebraic types, single‑case unions and smart… Talk
Thirteen ways of looking at a Turtle	NDC London 2021	2021-01-25
Builds a simple turtle API and delivers 13 implementations that each demonstrate a real FP technique: partial application, currying, State/Result/Async… Talk on
Building confidence in concurrent code with a model checker	NDC Oslo 2020	2020-06-08
Demonstrates using TLA+ and the TLC model checker to find real concurrency bugs: a queue model with max size 2 checks 1 producer/1 consumer (8 states) and… Talk on
The Power of Composition	NDC Oslo 2020	2020-06-08
Argues composition builds large systems from tiny reusable functions and types, demonstrated with a Roman‑numerals pipeline, a composable FizzBuzz using a… Talk on
Reinventing the Transaction Script	NDC London 2020	2020-01-27
Argues that classic Transaction Script becomes practical and testable by using F#-style functional techniques: model workflows as workflows as functions with… Talk on
The power of composition	DotNext 2019 Moscow	2019-11-06
Argues composition builds large systems from tiny, testable pieces and demonstrates it with C# and F# code: Roman numerals via a pipeline, FizzBuzz using a… Talk on
Domain Modeling Made Functional	KanDDDinsky 2019	2019-10-17
Shows how using F# and composable types (options, wrapper types, discriminated unions) turns vague fields into enforced invariants: email becomes EmailAddress… Talk on
The Functional Toolkit	NDC Oslo 2019	2019-06-17
Explains a compact toolkit of about 11 core functions — specifically map and bind, return, apply/lift and sequence — and shows concrete F# implementations… Talk on
The Functional Programmer's Toolkit	NDC London 2019	2019-01-30
Begins by naming eleven practical tools and then shows concrete implementations in F#: map, return, bind, apply plus reduce and monoid combiners. Demonstrates… Talk on
Four Languages from Forty Years Ago	NDC London 2019	2019-01-30
Claim: the 1970s produce the core paradigms still used today — SQL, Prolog, ML, Smalltalk and VisiCalc (the ancestor of Excel). SQL gives a expression-based… Talk on
The Power of Composition	NDC Oslo 2018	2018-06-11
Begins with concrete F# techniques: currying and partial application to turn multi-arg functions into composable one-arg pieces, then uses a pipeline style to… Talk on
Four Languages from Forty Years Ago	NDC Oslo 2018	2018-06-11
Survey of four 1970s languages shows concrete lessons: SQL is a expression-based set model with declarative queries, separable DDL/DML and interactive tuning… Talk on
The Power of Composition	NDC London 2018	2018-01-15
Clear claim: build large systems by composing tiny functions and types. Uses F# code: composition operator and pipe and compose operators, currying and partial… Talk on
Functional Design Patterns	NDC Sydney 2017	2017-08-14
Uses F# code to show exact patterns: uses a NonZeroInt type and Option return to make a divide function total, demonstrates partial application for DI by… Talk on
Domain Modeling Made Functional	NDC Sydney 2017	2017-08-14
Shows how F#’s type system—option type, discriminated union and generics—encodes business rules so invalid states can’t exist at compile time. Builds concrete… Talk on
F# for C# programmers	NDC Oslo 2017	2017-06-14
Compares C# and F# with concrete side‑by‑side code, demoing F# Interactive inside Visual Studio and VS Code (Ionide), a Roman‑numeral converter and pipeline… Talk on
Domain Modeling Made Functional	NDC Oslo 2017	2017-06-14
Shows concrete rewrites of a messy contact model into F# types that enforce rules at compile time: uses Option<T> instead of null, wraps strings as single-case… Talk on
Thirteen ways of looking at a Turtle	NDC London 2017	2017-01-16
Thirteen concrete implementations of a simple turtle API show actual tradeoffs: mutable OOP and opaque ADT versions, an immutable functional chain, State monad… Talk on
Understanding parser combinators: a deep dive	NDC Oslo 2016	2016-06-08
Builds a tiny parser-combinator library in F# from scratch (about 500 lines total) that exposes basic combinators: sequence, choice, map, many/optional and… Talk on
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