philipschwarz’s gists

philipschwarz / Main.scala

Last active September 10, 2017 15:09

	import scalaz._
	import Scalaz._
	import simulacrum._
	import stalactite._
	import scala.concurrent.Future
	import scala.io.StdIn.readLine

	object Main {

	trait Terminal[C[_]] {

philipschwarz / Main.scala

Created September 10, 2017 10:21

	import scalaz._
	import Scalaz._
	import simulacrum._
	import stalactite._
	import scala.concurrent.Future

	class Main {

	trait Terminal[C[_]] {
	def read: C[String]

philipschwarz / ScalaEnabledVisitorPattern.scala

Last active July 26, 2017 21:53


	abstract class Element(text: String) {
	def accept(visitor: Element => Unit): Unit =
	visitor(this)
	}

	case class Title(text: String) extends Element(text)
	case class Text(text: String) extends Element(text)
	case class Hyperlink(text: String, val url: String) extends Element(text)

philipschwarz / TraditionalVisitorPattern.scala

Last active July 26, 2017 21:53


	trait Visitor {
	def visit(title: Title)
	def visit(text: Text)
	def visit(hyperlink: Hyperlink)
	}

	abstract class Element(val text: String) {
	def accept(visitor: Visitor)
	}

philipschwarz / Listing_4_7_GeneratePrime.java

Last active July 19, 2017 05:43

Robert Martin in clean code: "I wrote the module in Listing 4-7...[as an] example of bad coding and commenting style. Kent Beck then refactored this code into a much more pleasant form in front of several dozen enthusiastic students. ...See how many different comment problems you can find...In Listing 4-8 you can see a refactored version"

	/**
	* This class Generates prime numbers up to a user specified
	* maximum. The algorithm used is the Sieve of Eratosthenes.
	* <p>
	* Eratosthenes of Cyrene, b. c. 276 BC, Cyrene, Libya --
	* d. c. 194, Alexandria. The first man to calculate the
	* circumference of the Earth. Also known for working on
	* calendars with leap years and ran the library at Alexandria.
	* <p>
	* The algorithm is quite simple. Given an array of integers

philipschwarz / Address.java

Last active January 12, 2016 22:16


	public class Address {
	private final String addressLine; // never null
	private final String city; // never null
	private final String postcode; // optional, thus may be null

	// constructor ensures non-null fields really are non-null
	// optional field can just be stored directly, as null means optional
	public Address(String addressLine, String city, String postcode) {
	this.addressLine = Preconditions.chckNotNull(addressLine);

philipschwarz / Main.java

Last active December 25, 2015 06:25

	import org.jooq.lambda.tuple.Tuple2;

	import static java.util.stream.Stream.iterate;
	import static org.jooq.lambda.tuple.Tuple.tuple;

	public class Main
	{
	public static void main(String[] args)
	{
	iterate(

philipschwarz / SortSalaries.java

Created April 24, 2015 09:47

	package test;

	import java.io.File;
	import java.io.FileNotFoundException;
	import java.io.FileReader;
	import java.io.FileWriter;
	import java.io.IOException;
	import java.io.LineNumberReader;
	import java.util.Collections;
	import java.util.Iterator;

philipschwarz / multimethods.clj

Created February 3, 2015 23:44

	(defmulti area
	"Calculate the area of a shape"
	:type)

	(defmethod area :rectangle [shape]
	(* (:length shape) (:width shape)))

	(defmethod area :circle [shape]
	(* (. Math PI) (:radius shape) (:radius shape)))

philipschwarz / Java8SyntacticSugar.java

Last active August 29, 2015 14:13

tasting the lambda syntactic sugar that the Java 8 Compiler lets you write in place of an instance of a required functional interface

	IntStream.of(1, 2, 3).forEach( new IntConsumer() { public void accept(int value) { System.out.println(value); } } );
	IntStream.of(1, 2, 3).forEach( new IntConsumer() { public void accept(int n) { System.out.println(n); } } );
	IntStream.of(1, 2, 3).forEach( (int n) -> { System.out.println(n); } );
	IntStream.of(1, 2, 3).forEach( (int n) -> System.out.println(n) );
	IntStream.of(1, 2, 3).forEach( n -> System.out.println(n) );
	IntStream.of(1, 2, 3).forEach( System.out::println );

Philip philipschwarz