jonbodner

//based on code from http://www.arcfn.com/2009/03/y-combinator-in-arc-and-java.html

class YFact {
    // T function returning a T
    // T -> T
    public static interface Func<T> {
        T apply(T n);
    }

    // Higher-order function returning a T function

jonbodner

type Foo struct {
	A int `tag1:"First Tag" tag2:"Second Tag"`
	B string
}

func main() {
	sl := []int{1, 2, 3}
	greeting := "hello"
	greetingPtr := &greeting
	f := Foo{A: 10, B: "Salutations"}

jonbodner

package main

import "fmt"
import "sort"

type EMPTY struct {}

var PRESENT EMPTY = EMPTY{}

func partition(val int) []string {

jonbodner

switch v.Kind() {
	case reflect.Map:
	// Map key must either have string kind, have an integer kind,
	// or be an encoding.TextUnmarshaler.
	t := v.Type()
	switch t.Key().Kind() {
		case reflect.String,
			reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
			reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
 		default:

jonbodner

@RunWith(Parameterized.class)
public class CalculatorTest {
  @Parameters(name = "{index}: CalculatorTest({0})={1}, throws {2}")
  public static Collection<Object[]> data() {
    return Arrays.asList(new Object[][]{
      {"1 + 1", 2, null},
      {"1 + 1 + 1", 3, null},
      {"1–1", 0, null},
      {"1 * 1", 1, null},
      {"1 / 1", 1, null},

jonbodner

@RunWith(SpringRunner.class)
@SpringBootTest
public class DemoApplicationTests {

    @Autowired
    ApplicationContext ac;

    @Test
    public void contextLoads() {
        Calculator calculator = ac.getBean(Calculator.class);

jonbodner

        	<plugin>
                <groupId>org.jacoco</groupId>
                <artifactId>jacoco-maven-plugin</artifactId>
                <version>0.8.2</version>
            	<executions>
                    <execution>
                    	<goals>
                            <goal>prepare-agent</goal>
                        </goals>
                    </execution>

jonbodner

	<reporting>
		<plugins>
        	<plugin>
                <groupId>org.jacoco</groupId>
                <artifactId>jacoco-maven-plugin</artifactId>
            	<reportSets>
                    <reportSet>
                        <reports>
     	                   <!-- select non-aggregate reports -->
                            <report>report</report>

jonbodner

public class CalculatorImpl implements Calculator {
  public CalculatorImpl() {
  }
  
  @Override
  public double process(String expression) {
    String[] tokens = expression.split(" ");
    Deque<String> operators = new ArrayDeque<>();
    Deque<Double> numbers = new ArrayDeque<>();
    try {

jonbodner

@Parameters(name = "{index}: CalculatorTest({0})={1}, throws {2}")
public static Collection<Object[]> data() {
  return Arrays.asList(new Object[][]{
    {"1 + 1", 2, null},
    {"1 + 1 + 1", 3, null},
    {"1–1", 0, null},
    {"1 * 1", 1, null},
    {"1 / 1", 1, null},
    {"( 1 + 1 )", 2, null},
    {"+", 0, new CalculatorException("Invalid expression: +")},