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Advanced Functional Programming with Scala - Notes

Copyright © 2017 Fantasyland Institute of Learning. All rights reserved.

1. Mastering Functions

A function is a mapping from one set, called a domain, to another set, called the codomain. A function associates every element in the domain with exactly one element in the codomain. In Scala, both domain and codomain are types.

val square : Int => Int = x => x * x

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// Spawn your futures
val fs = (1 to 100).map { i =>
  Future { Thread.sleep(i); i }
}

// Wrap all of the work up into a single
// Future
val f = Future.sequence(fs)

// Wait on it forever - i.e. until it's done

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package flowcontrol

import scala.concurrent.duration._

import akka.actor.typed.ActorRef
import akka.actor.typed.ActorSystem
import akka.actor.typed.Behavior
import akka.actor.typed.scaladsl.Behaviors

/**

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Title

<Additional information about your API call. Try to use verbs that match both request type (fetching vs modifying) and plurality (one vs multiple).>

• URL

  <The URL Structure (path only, no root url)>

• Method:

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       ssize_t read(int fd, void *buf, size_t count);

       ssize_t write(int fd, const void *buf, size_t count);