This article describes the creation process of a node application with TypeScript.
There are multiple ways to install node but we have picked the nvm path. This method will
allow us to have multiple versions of node installed on the …
Some of my notes and best practices learned over the years designing and developing microservices.
There are times when we want access to additional data structures and function libraries than the ones provided by MetaTrader’s MQL. Besides native open-source MQL options, we can create our own Dynamic Link Library (DLL) in C# or C++ and link …
This article discusses different common scenarios for JSON parsing and conversion, useful when working with the Play Framework library. All the examples in the article, use one or more of the following library imports:
1import …A curated list of Scala lectures on functional programming and design patterns.
In …
Cats Effect IO operations have to be performed at the highest level possible. So when working with the Play Framework the solution is to execute unsafeToFuture() in the controller methods.
1def get = Action.async { implicit request =>
2 service. …Scala example for using the retry-with-backoff pattern with Cats Effect IO.
A functor is a design pattern that allows us to apply a function to a contextualized (wrapped) type. This is accomplished by implementing the map function:
1fmap :: (a -> b) -> f a -> f b
Lazy evaluation is a strategy that delays expression evaluation until their value is needed. It also avoids repeated evaluations by returning previously computed results by storing them in a lookup table.
Why isn’t lazy evaluation used …
This implementation is based on the work of Malcolm, and exists because it provides the cleanest use of similar monads.
The base monad wraps an Either class in a Future class:
1import scala.concurrent.{ExecutionContext, Future}
2import scala.util.{ …