37e433697f0fe31d286a39a76cc0abf9ba78c227d3fa4c7ed4f4bbc724317de8 mrcmatuszak

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I am mrcmatuszak on github.
I am marcinmatuszak (https://keybase.io/marcinmatuszak) on keybase.
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AWS Certification notes

Those are my personal notes on AWS Solution Architect certification preparation. Hope you find them usefull.

To pass AWS certification, you should have:

Sound knowledge about most of the AWS services ( EC2, VPC, RDS, Cloudfront, S3, Route53 etc,)
Hands on experience with AWS services.

A curated list of AWS resources to prepare for the AWS Certifications

A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.

For more about AWS and AWS Certifications and updates to this Gist you should follow me @leonardofed

Advanced Functional Programming with Scala - Notes

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

These links no longer work. Springer have pulled the free plug.

Graduate texts in mathematics

duplicates = multiple editions

A Classical Introduction to Modern Number Theory, Kenneth Ireland Michael Rosen

	[error] (run-main-0) java.lang.IllegalStateException: Illegal GraphDSL usage. Inlets [GraphStages$Identity$.in] were not returned in the resulting shape and not connected. Outlets [Collect.out, Map.out] were not returned in the resulting shape and not connected.
	java.lang.IllegalStateException: Illegal GraphDSL usage. Inlets [GraphStages$Identity$.in] were not returned in the resulting shape and not connected. Outlets [Collect.out, Map.out] were not returned in the resulting shape and not connected.
	at akka.stream.scaladsl.GraphDSL$Builder.result(Graph.scala:1163)
	at akka.stream.scaladsl.GraphApply.createGraph(GraphApply.scala:539)
	at akka.stream.scaladsl.GraphApply.create(GraphApply.scala:19)
	at akka.stream.scaladsl.GraphApply.create$(GraphApply.scala:15)
	at akka.stream.scaladsl.GraphDSL$.create(Graph.scala:1036)
	at Main2$.delayedEndpoint$com$ryanair$bi$ngmcs$Main2$1(App.scala:91)
	at Main2$delayedInit$body.apply(App.scala:22)
	at scala.Function0.apply$mcV$sp(Function0.scala:34)

	case class User(id: Long, name: String)


	/**
	Następujący scenariusz
	UserService zależy od UserRepository. UserRepository wyciąga dane np z bazy.

	Kilka przypadków

	1. UserService zależy bezpośrednio od UserRepository (który jest klasą)

	object Counter {
	type CounterState = State[Int, Int]
	}

	trait Counter {
	import Counter._
	def inc: CounterState = State { s => (s + 1, s + 1) }
	}

	trait Service {

	package main

	import cats.data.State

	object Example {

	type CounterState = State[Int, Unit]

	def inc: CounterState = State { s => (s + 1, ()) }
	def dec: CounterState = State { s => (s - 1, ()) }

	package test

	import shapeless.{HNil, Poly1}


	object Main extends App {

	sealed trait Product {
	def name: String
	def unitPrice: BigDecimal