Make a Personal Learning path — Kan-ban board After 14 years of professional development, if i could go back to my early developer days, i would have designed my own learning path and made sure i followed it. Sure, i had formal Computer science education, which in hindsight is [almost] completely useless. Academia is consistently lagging behind what…

One can argue that composing functions is the most important idea in programming and functional programming in particular. The idea of compositionality is of monumental importance in human thinking. Creating systems by composing smaller systems that are easier to implement and design can be found in all levels of programming…

functional patterns in C# Source In this short article we are going to see some minimal case of the specification pattern but also is a glimpse on compositionality of C# delegates. Lets say we have this simple item public record struct Item(int Id, string Name); List<Item> items = new List<Item>…

Functional patterns I remember a decade ago when i was trying to understand why .net has delegates. A Delegate is just a function signature that has a Name. …

Quick Functional Refactorings in C# — function follows form. This will be Quick, and i want you to just grab the syntax.(Source) Lets say we have this class: public class OperationManager<T, R> { public async Task<R> OperationAsync(T t) => {...}; } I can add this extension method : public static partial class FuntionalExtensions {…

No covariance is not a hard concept.Its is actually very easy to grasp. Source : https://gist.github.com/dimitris-papadimitriou-chr/578f76c2d4b8d18f6f7fc8e69dcf0153 No covariance is not a hard concept.Its is actually very easy to grasp. What is covariance in C# and what has to do with functional C#. The Problem Assume that you have this simple …

Functional composition is in the heart of many object-oriented best practices. Here we will see an idiomatic expression of the Decorator design pattern, which is one of the most used object-oriented design patterns from Gang of Four. Let start with simple example where we have a ProductA , and we…

github repo : https://github.com/dimitris-papadimitriou-chr/FunctionalJsWithCategories/blob/master/monads/state-example-1/demo.js This is a short article on how to create a game loop using the State monad. Unfortunately i am not going to cover the theory of State monad in this article but hopefully i would do this in a subsequent article. using the State we can…

Functors are closed under composition. This means that we should be able to construct a well-behaved map method for the composition. Functors are closed under composition. The term closed means that if we have two functors and we compose them (have a functor-in-a-functor situation like Maybe<Id<>> or Maybe<Array<>>, Array<Array<>> etc)…