Initial Commit

.idea/.gitignore

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+# Default ignored files
+/workspace.xml

.idea/codeStyles/Project.xml

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+<component name="ProjectCodeStyleConfiguration">
+  <code_scheme name="Project" version="173">
+    <JetCodeStyleSettings>
+      <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
+    </JetCodeStyleSettings>
+    <codeStyleSettings language="kotlin">
+      <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
+    </codeStyleSettings>
+  </code_scheme>
+</component>

.idea/codeStyles/codeStyleConfig.xml

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+<component name="ProjectCodeStyleConfiguration">
+  <state>
+    <option name="USE_PER_PROJECT_SETTINGS" value="true" />
+  </state>
+</component>

.idea/kotlinc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Kotlin2JvmCompilerArguments">
+    <option name="jvmTarget" value="1.8" />
+  </component>
+  <component name="KotlinCommonCompilerArguments">
+    <option name="apiVersion" value="1.3" />
+    <option name="languageVersion" value="1.3" />
+  </component>
+</project>

.idea/libraries/KotlinJavaRuntime.xml

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+<component name="libraryTable">
+  <library name="KotlinJavaRuntime">
+    <CLASSES>
+      <root url="jar://$KOTLIN_BUNDLED$/lib/kotlin-stdlib.jar!/" />
+      <root url="jar://$KOTLIN_BUNDLED$/lib/kotlin-reflect.jar!/" />
+      <root url="jar://$KOTLIN_BUNDLED$/lib/kotlin-test.jar!/" />
+      <root url="jar://$KOTLIN_BUNDLED$/lib/kotlin-stdlib-jdk7.jar!/" />
+      <root url="jar://$KOTLIN_BUNDLED$/lib/kotlin-stdlib-jdk8.jar!/" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://$KOTLIN_BUNDLED$/lib/kotlin-stdlib-sources.jar!/" />
+      <root url="jar://$KOTLIN_BUNDLED$/lib/kotlin-reflect-sources.jar!/" />
+      <root url="jar://$KOTLIN_BUNDLED$/lib/kotlin-test-sources.jar!/" />
+      <root url="jar://$KOTLIN_BUNDLED$/lib/kotlin-stdlib-jdk7-sources.jar!/" />
+      <root url="jar://$KOTLIN_BUNDLED$/lib/kotlin-stdlib-jdk8-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="11" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/HelloKotlin.iml" filepath="$PROJECT_DIR$/HelloKotlin.iml" />
+    </modules>
+  </component>
+</project>

.idea/vcs.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

HelloKotlin.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="KotlinJavaRuntime" level="project" />
+  </component>
+</module>

src/ams.kt

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+import java.util.*
+
+fun main(args: Array<String>) {
+    feedTheFish()
+}
+
+fun shouldChangeWater(
+    day: String,
+    temp: Int = 22,
+    dirty: Int = 22
+): Boolean {
+    return when {
+        isTooHot(temp) -> true
+        isDirty(dirty) -> true
+        isSunday(day) -> true
+        else -> false
+    }
+}
+
+fun isTooHot(temp: Int) = temp > 30
+fun isDirty(dirty: Int) = dirty > 30
+fun isSunday(day: String) = day == "Sunday"
+
+fun dayOfWeek() {
+    println("What day is it today?")
+    var day: String? = null
+    day = when(Calendar.getInstance().get(Calendar.DAY_OF_WEEK)) {
+        1 -> "Sunday"
+        2 -> "Monday"
+        3 -> "Tuesday"
+        4 -> "Wednesday"
+        5 -> "Thursday"
+        6 -> "Friday"
+        7 -> "Saturday"
+        else -> "wut?"
+    }
+    println("Today is: $day")
+}
+
+fun feedTheFish() {
+    val day = randomDay()
+    val food = fishFood(day)
+    print("Today is $day and the fish eat $food")
+    if (shouldChangeWater(day)) {
+        println("Change the water today")
+    }
+}
+
+fun fitMoreFish(
+    tankSize: Double,
+    currentFish: List<Int>,
+    fishSize: Int = 2,
+    hasDecorations: Boolean = true
+): Boolean {
+    val tankCap = tankSize.times(if(hasDecorations) 0.8 else 1.0)
+    val currentTotalSize = if(currentFish.isNotEmpty()) currentFish.sum() else 0
+    return tankCap.minus(currentTotalSize) >= fishSize
+}
+
+fun fishFood(day: String): String {
+    return when(day) {
+        "Monday" -> "flakes"
+        "Tuesday" -> "pellets"
+        "Wednesday" -> "redworms"
+        "Thursday" -> "granules"
+        "Friday" -> "mosquitoes"
+        "Saturday" -> "lettuce"
+        "Sunday" -> "plankton"
+        else -> "fasting"
+    }
+}
+
+fun randomDay() : String {
+    val week = listOf<String>("Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday")
+    return week[Random().nextInt(week.count())]
+}

src/dice.kt

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+import java.util.*
+
+fun main(args: Array<String>) {
+    val roll12 = { Random().nextInt(12) + 1 }
+    val rollDie: (Int) -> Int = { sides -> if (sides == 0) 0 else Random().nextInt(sides) + 1 }
+}

src/fortune.kt

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+fun main(args: Array<String>) {
+    val birthday = getBirthday()
+    val fortune = getFortune(birthday)
+    println("Your fortune is: $fortune")
+}
+
+fun getBirthday(): Int {
+    print("Enter your birthday:")
+    return readLine()?.toIntOrNull() ?: 1
+}
+
+fun getFortune(birthday: Int): String {
+    val fortunes = listOf<String>(
+        "You will have a great day!",
+        "Things will go well for you today.",
+        "Enjoy a wonderful day of success.",
+        "Be humble and all will turn out well.",
+        "Today is a good day for exercising restraint.",
+        "Take it easy and enjoy life!",
+        "Treasure your friends because they are your greatest fortune."
+    )
+    val index = when(birthday) {
+        in 1..5 -> 4
+        6, 22 -> 5
+        else -> birthday.rem(fortunes.size)
+    }
+    return fortunes[index]
+}
+
+
+

src/whatToDoToday.kt

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+fun main(args: Array<String>) {
+    println(whatShouldIDoToday("happy"))
+}
+
+fun whatShouldIDoToday(
+    mood: String,
+    weather: String = "sunny",
+    temp: Int = 24
+): String {
+    return when {
+        isHappyMood(mood) && isSunnyWeather(weather) -> "go for a walk"
+        isSadMood(mood) && isRainyWeather(weather) && isColdTemp(temp) -> "stay in bed"
+        isWarmTemp(temp) -> "go swimming"
+        else -> "stay home and read"
+    }
+}
+
+fun isHappyMood(mood: String) = mood == "happy"
+fun isSadMood(mood: String) = mood == "sad"
+fun isSunnyWeather(weather: String) = weather == "sunny"
+fun isRainyWeather(weather: String) = weather == "rainy"
+fun isColdTemp(temp: Int) = temp <= 0
+fun isWarmTemp(temp: Int) = temp >= 23