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package com.tartner.vertx

import io.vertx.core.eventbus.*
import io.vertx.kotlin.coroutines.*
import kotlinx.coroutines.experimental.*
import java.util.*

sealed class CodeMessage<T: Any>(val block: suspend (DirectCallVerticle) -> T)
class ReturnValueCodeMessage<T: Any>(block: suspend (DirectCallVerticle) -> T): CodeMessage<T>(block)
class UnitCodeMessage(block: suspend (DirectCallVerticle) -> Unit): CodeMessage<Unit>(block)

bdavisx

package com.tartner.vertx

import io.vertx.core.eventbus.*
import io.vertx.kotlin.coroutines.*
import kotlinx.coroutines.experimental.*
import java.util.*

sealed class CodeMessage<T: Any>(val block: suspend () -> T)
class ReturnValueCodeMessage<T: Any>(block: suspend () -> T): CodeMessage<T>(block)
class UnitCodeMessage(block: suspend () -> Unit): CodeMessage<Unit>(block)

bdavisx

import org.jetbrains.spek.api.Spek
import org.jetbrains.spek.api.dsl.describe
import org.jetbrains.spek.api.dsl.it
import org.junit.Assert.assertEquals

fun <A,B,C> uncurry(function: (A) -> ((B) -> C)): (A,B) -> C {
    return fun(a: A, b: B): C {
        return function(a)(b)
    }
}

bdavisx

import org.jetbrains.spek.api.Spek
import org.jetbrains.spek.api.dsl.describe
import org.jetbrains.spek.api.dsl.it
import org.junit.Assert.assertEquals

fun <A,B,C> curry(function: (A,B) -> C): (A) -> ((B) -> C) {
    return fun (a: A): (B) -> C {
        return fun (b: B): C {
            return function(a, b)
        }

bdavisx

class Ch02Test : Spek({
    val expectedValues = arrayOf(0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610,
        987, 1597, 2584, 4181, 6765, 10946, 17711, 28657, 46368, 75025, 121393, 196418, 317811)

    fun runFibonacciTests(function: (Int) -> Int) {
        it("should return the correct first value") {
            assertEquals(0, function(0))
        }

        it("should return the correct values in expectedValues") {

bdavisx

import org.jetbrains.spek.api.Spek
import org.jetbrains.spek.api.dsl.describe
import org.jetbrains.spek.api.dsl.it
import kotlin.test.assertFalse
import kotlin.test.assertTrue

fun <A> isSorted(array: Array<A>, ordered: (A,A) -> Boolean): Boolean {
    tailrec fun loop(current: Int): Boolean {
        when(current) {
            array.size -> return true

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fun fibonacci2(n: Int): Int {
    tailrec fun loop(n: Int, previous: Int, current: Int): Int {
        return if( n == 0 ) {
            previous
        } else {
            loop(n-1, current, previous+current)
        }
    }

    return loop(n, 0, 1)

bdavisx

import org.jetbrains.spek.api.Spek
import org.jetbrains.spek.api.dsl.describe
import org.jetbrains.spek.api.dsl.it
import org.junit.Assert

fun fibonacci(n: Int): Int {
    tailrec fun loop(n: Int, previous: Int, current: Int): Int {
        return when(n) {
            0 -> previous
            else -> loop(n-1, current, previous+current)

bdavisx

fun <A,B,C> curry(function: (A,B) -> C): (A) -> (B) -> C {
    return fun (a: A): (B) -> C {
        return fun (b: B): C {
            return function(a, b)
        }
    }
}

bdavisx

using System;

namespace EventRecorderExample {
    public class Customer {
        private IEventRecorder eventRecorder = EventRecorder.CreateEventRecorder();
           
        // rest of implementation...
    }

    public class EventRecorder : IEventRecorder {