J. B. Rainsberger jbrains

A professional 5-pin bowler who helps programmers work with less stress. #Lightweight #xplives

jbrains / test.purs

Created December 24, 2021 14:11

WANTED: A more concise way to execute a side effect in a test without checking its result

	checkSellMultipleItems :: Spec Unit
	checkSellMultipleItems =
	describe "Sell Multiple Items" do
	it "happy path" do
	(POS.handleCommand $ TextCommand "12345") `shouldSatisfy` (const true)
	(POS.handleCommand $ TextCommand "total") `shouldEqual` "Total: CAD 27.50"

jbrains / VirtualPointOfSaleTerminal.java

Created April 30, 2019 13:32

A simple example of wiring an application together

	package ca.jbrains.pos;

	import ca.jbrains.pos.ui.TextProcessorAndCommandInterpreter;
	import ca.jbrains.pos.ui.lcd.UdpPostOffice;
	import java.io.IOException;
	import java.io.InputStreamReader;
	import java.util.HashMap;

	public class VirtualPointOfSaleTerminal {
	public static void main(String[] args) throws IOException {

jbrains / StringBuilderWithFolding.java

Created November 21, 2018 09:56

What obvious way of using Vavr's fold() am I missing here?

	private String linesOf(List<String> lines) {
	StringBuilder stringBuilder = new StringBuilder();
	lines.map(line -> stringBuilder.append(line).append(System.lineSeparator()));
	return stringBuilder.toString();
	}

jbrains / DocumentConnectToDatabaseWithExposed.kt

Created November 4, 2018 20:22

First steps in using Kotlin, Exposed, and writing tests

	import io.kotlintest.Description
	import io.kotlintest.Spec
	import io.kotlintest.extensions.TestListener
	import io.kotlintest.shouldBe
	import io.kotlintest.specs.FreeSpec
	import org.jetbrains.exposed.dao.EntityID
	import org.jetbrains.exposed.dao.IntEntity
	import org.jetbrains.exposed.dao.IntEntityClass
	import org.jetbrains.exposed.dao.IntIdTable
	import org.jetbrains.exposed.sql.Database

jbrains / LearnToMergeAFreemarkerTemplateTest.java

Created October 15, 2018 16:58

Why do we do this? Why isn't it easier just to create a template in memory and merge it with data in memory?

	package ca.jbrains.org.freemarker;

	import freemarker.template.Configuration;
	import freemarker.template.Template;
	import freemarker.template.TemplateException;
	import io.vavr.collection.HashMap;
	import io.vavr.collection.Map;
	import org.junit.Assert;
	import org.junit.Test;

jbrains / LearnReadingLinesTest.java

Created October 13, 2018 19:16

An example of using a custom Hamcrest matcher to write tests. What do you think of this style?

	package ca.jbrains.java.test;

	import ca.jbrains.java.ReaderBasedTextSource;
	import io.vavr.collection.List;
	import io.vavr.collection.Stream;
	import org.hamcrest.Description;
	import org.hamcrest.Factory;
	import org.hamcrest.Matcher;
	import org.hamcrest.TypeSafeMatcher;
	import org.junit.Assert;

jbrains / factors.java

Created July 22, 2018 23:49

Find the number of factors of 5 in natural number n

	public static int factorsOfFiveIn(int n) {
	int factorsOfFive = 0;
	while (n > 1) {
	if (n % 5 == 0) factorsOfFive++;
	n /= 5;
	}
	return factorsOfFive;
	}

jbrains / NonRepeatingNumbers.cs

Last active July 20, 2018 21:21 — forked from aswhitehouse/NonRepeatingNumbers.cs

	using System.Collections.Generic;
	using System.Linq;
	using NUnit.Framework;

	//Using Maybe.cs
	namespace ArrayStructure
	{
	[TestFixture]
	public class Tests
	{

jbrains / ReturnConstructor.elm

Created December 6, 2017 10:35

Which, in your opinion, is "better"?

	-- This version returns a constructor for a PlayerModel, needing only a "name"
	playerNeedingName : Maybe PlayerModel -> List PlayerModel -> (String -> PlayerModel)
	playerNeedingName selectedPlayer players =
	selectedPlayer
	\|> Maybe.map withName
	\|> Maybe.withDefault (nextPlayerModel players)

jbrains / keybase.md

Created September 21, 2017 15:45

keybase.md

I hereby claim:

To claim this, I am signing this object: