├── .gitignore
├── .idea
    ├── .gitignore
    ├── codeStyles
    │   ├── Project.xml
    │   └── codeStyleConfig.xml
    ├── kotlinc.xml
    ├── libraries
    │   └── KotlinJavaRuntime.xml
    ├── misc.xml
    └── modules.xml
├── kotlin-crash-course.iml
└── src
    ├── Animal.kt
    ├── Cat.kt
    ├── Dog.kt
    └── Main.kt


/.gitignore:
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1 | # Project exclude paths
2 | /out/


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/.idea/.gitignore:
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1 | # Default ignored files
2 | /workspace.xml


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/.idea/codeStyles/Project.xml:
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 1 | <component name="ProjectCodeStyleConfiguration">
 2 |   <code_scheme name="Project" version="173">
 3 |     <JetCodeStyleSettings>
 4 |       <option name="PACKAGES_TO_USE_STAR_IMPORTS">
 5 |         <value>
 6 |           <package name="java.util" alias="false" withSubpackages="false" />
 7 |           <package name="kotlinx.android.synthetic" alias="false" withSubpackages="true" />
 8 |           <package name="io.ktor" alias="false" withSubpackages="true" />
 9 |         </value>
10 |       </option>
11 |       <option name="PACKAGES_IMPORT_LAYOUT">
12 |         <value>
13 |           <package name="" alias="false" withSubpackages="true" />
14 |           <package name="java" alias="false" withSubpackages="true" />
15 |           <package name="javax" alias="false" withSubpackages="true" />
16 |           <package name="kotlin" alias="false" withSubpackages="true" />
17 |           <package name="" alias="true" withSubpackages="true" />
18 |         </value>
19 |       </option>
20 |       <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
21 |     </JetCodeStyleSettings>
22 |     <codeStyleSettings language="kotlin">
23 |       <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
24 |     </codeStyleSettings>
25 |   </code_scheme>
26 | </component>


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/.idea/codeStyles/codeStyleConfig.xml:
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1 | <component name="ProjectCodeStyleConfiguration">
2 |   <state>
3 |     <option name="USE_PER_PROJECT_SETTINGS" value="true" />
4 |   </state>
5 | </component>


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/.idea/kotlinc.xml:
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1 | <?xml version="1.0" encoding="UTF-8"?>
2 | <project version="4">
3 |   <component name="Kotlin2JvmCompilerArguments">
4 |     <option name="jvmTarget" value="1.8" />
5 |   </component>
6 | </project>


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/.idea/libraries/KotlinJavaRuntime.xml:
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 1 | <component name="libraryTable">
 2 |   <library name="KotlinJavaRuntime">
 3 |     <CLASSES>
 4 |       <root url="jar://$KOTLIN_BUNDLED$/lib/kotlin-stdlib.jar!/" />
 5 |       <root url="jar://$KOTLIN_BUNDLED$/lib/kotlin-reflect.jar!/" />
 6 |       <root url="jar://$KOTLIN_BUNDLED$/lib/kotlin-test.jar!/" />
 7 |       <root url="jar://$KOTLIN_BUNDLED$/lib/kotlin-stdlib-jdk7.jar!/" />
 8 |       <root url="jar://$KOTLIN_BUNDLED$/lib/kotlin-stdlib-jdk8.jar!/" />
 9 |     </CLASSES>
10 |     <JAVADOC />
11 |     <SOURCES>
12 |       <root url="jar://$KOTLIN_BUNDLED$/lib/kotlin-stdlib-sources.jar!/" />
13 |       <root url="jar://$KOTLIN_BUNDLED$/lib/kotlin-reflect-sources.jar!/" />
14 |       <root url="jar://$KOTLIN_BUNDLED$/lib/kotlin-test-sources.jar!/" />
15 |       <root url="jar://$KOTLIN_BUNDLED$/lib/kotlin-stdlib-jdk7-sources.jar!/" />
16 |       <root url="jar://$KOTLIN_BUNDLED$/lib/kotlin-stdlib-jdk8-sources.jar!/" />
17 |     </SOURCES>
18 |   </library>
19 | </component>


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/.idea/misc.xml:
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1 | <?xml version="1.0" encoding="UTF-8"?>
2 | <project version="4">
3 |   <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="11" project-jdk-type="JavaSDK">
4 |     <output url="file://$PROJECT_DIR$/out" />
5 |   </component>
6 | </project>


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/.idea/modules.xml:
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1 | <?xml version="1.0" encoding="UTF-8"?>
2 | <project version="4">
3 |   <component name="ProjectModuleManager">
4 |     <modules>
5 |       <module fileurl="file://$PROJECT_DIR$/kotlin-crash-course.iml" filepath="$PROJECT_DIR$/kotlin-crash-course.iml" />
6 |     </modules>
7 |   </component>
8 | </project>


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/kotlin-crash-course.iml:
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 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <module type="JAVA_MODULE" version="4">
 3 |   <component name="NewModuleRootManager" inherit-compiler-output="true">
 4 |     <exclude-output />
 5 |     <content url="file://$MODULE_DIR$">
 6 |       <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
 7 |     </content>
 8 |     <orderEntry type="inheritedJdk" />
 9 |     <orderEntry type="sourceFolder" forTests="false" />
10 |     <orderEntry type="library" name="KotlinJavaRuntime" level="project" />
11 |   </component>
12 | </module>


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/src/Animal.kt:
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 1 | abstract class Animal(
 2 |     val name: String,
 3 |     val legCount: Int = 4
 4 | ) {
 5 | 
 6 |     init {
 7 |         println("Hello, my name is $name")
 8 |     }
 9 | 
10 |     abstract fun makeSound()
11 | }


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/src/Cat.kt:
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1 | class Cat : Animal("Cat") {
2 | 
3 |     override fun makeSound() {
4 |         println("MEOW!!!")
5 |     }
6 | }


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/src/Dog.kt:
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1 | 
2 | 
3 | class Dog : Animal("Dog") {
4 | 
5 |     override fun makeSound() {
6 |         println("WUFF!!!")
7 |     }
8 | }


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/src/Main.kt:
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 1 | 
 2 | 
 3 | fun main() {
 4 |     val list = listOf("Kotlin", "is", "fun")
 5 |     val count = list.customCount { currentString ->
 6 |         currentString.length >= 3
 7 |     }
 8 |     println(count)
 9 | }
10 | 
11 | fun <T> List<T>.customCount(function: (T) -> Boolean): Int {
12 |     var counter = 0
13 |     for(string in this) {
14 |         if(function(string)) {
15 |             counter++
16 |         }
17 |     }
18 |     return counter
19 | }
20 | 
21 | fun Int.isOdd(): Boolean {
22 |     return this % 2 == 1
23 | }
24 | 
25 | fun isEven(number: Int = 10): Boolean {
26 |     return number % 2 == 0
27 | }
28 | 
29 | fun print10Numbers() {
30 |     for(i in 1..10) {
31 |         println(i)
32 |     }
33 | }
34 | 


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