push project belajar kotlin dasar

.gitignore

@@ -0,0 +1 @@
+out

belajar-kotlin-dasar.iml

@@ -0,0 +1,12 @@
+<?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/AnonymousFunction.kt

@@ -0,0 +1,23 @@
+fun main() {
+
+    fun hello(name: String, transformer: (String) -> String): String {
+        val nameTransform = transformer(name)
+        return "Hello $nameTransform"
+    }
+
+    val upper = fun(value: String): String {
+        if (value == "") {
+            return "UPS"
+        } else {
+            return value.toUpperCase()
+        }
+    }
+
+    println(hello("Eko", upper))
+    println(hello("", upper))
+
+    println(hello("Kurniawan", fun(value: String): String {
+        return value.toLowerCase()
+    }))
+
+}

src/Array.kt

@@ -0,0 +1,21 @@
+fun main() {
+
+    val names: Array<String> = arrayOf("Eko", "Joko", "Budi")
+    // names.set(0, "Rudi")
+    names[0] = "Rudi"
+    println(names[0])
+
+    val nilai: Array<Int> = arrayOf(10,9,8)
+    println(nilai[0])
+    println(nilai[1])
+    println(nilai[2])
+
+    val members: Array<String?> = arrayOfNulls(5)
+    members[0] = "Eko"
+    members[1] = "Eko"
+    members[2] = "Eko"
+    members[3] = null
+    members[4] = "Eko"
+    println(members.size)
+
+}

src/Boolean.kt

@@ -0,0 +1,7 @@
+fun main() {
+    var benar: Boolean = true
+    var salah: Boolean = false
+
+    println(benar)
+    println(salah)
+}

src/BreakContinue.kt

@@ -0,0 +1,23 @@
+fun main() {
+
+    var i = 0
+
+    while (true) {
+        println("Hello ke $i")
+        i++
+
+        if (i > 1000) {
+            break
+        }
+    }
+
+    for (i in 1..1000) {
+
+        if (i % 2 == 0) {
+            continue
+        }
+
+        println("Angka $i")
+    }
+
+}

src/Character.kt

@@ -0,0 +1,9 @@
+fun main() {
+    var e: Char = '3'
+    var k: Char = 'K'
+    var o: Char = '0'
+
+    print(e)
+    print(k)
+    print(o)
+}

src/Closure.kt

@@ -0,0 +1,28 @@
+fun main() {
+
+    var counter: Int = 0
+
+    val lambdaIncrement: () -> Unit = {
+        println("Lambda increment")
+        counter++
+    }
+
+    val anonymousIncremetn = fun() {
+        println("Anonymous Function increment")
+        counter++
+    }
+
+    fun functionIncrement(){
+        println("Function increment")
+        counter++
+    }
+
+    lambdaIncrement()
+    anonymousIncremetn()
+    functionIncrement()
+    lambdaIncrement()
+    anonymousIncremetn()
+    functionIncrement()
+
+    println(counter)
+}

src/DoWhileLoop.kt

@@ -0,0 +1,10 @@
+fun main() {
+
+    var i = 0
+
+    do {
+        println("Perulangan ke $i")
+        i++
+    } while (i < 10)
+
+}

src/ExtensionFunction.kt

@@ -0,0 +1,13 @@
+fun String.hello(): String = "Hello $this"
+
+fun String.printHello(): Unit = println("Hello $this")
+
+fun main() {
+    val name = "Eko"
+
+    println(name.hello())
+
+    name.printHello()
+
+    "Kurniawan".printHello()
+}

src/ForLoop.kt

@@ -0,0 +1,17 @@
+fun main() {
+
+    var array = arrayOf("Eko", "Kurniawan", "Khannedy", "Joko", "Budi", "Rudi")
+
+    var total = 0
+    for (name in array) {
+        println(name)
+        total++
+    }
+    println("Total perulangan = $total")
+
+    val ukuranArray = array.size - 1
+    for (i in 0..ukuranArray) {
+        println("Index $i = ${array.get(i)}")
+    }
+
+}

src/Function.kt

@@ -0,0 +1,11 @@
+
+fun helloWorld(){
+    println("Hello Dunia")
+    println("Selamat Belajar Kotlin")
+}
+
+fun main() {
+    helloWorld()
+    helloWorld()
+    helloWorld()
+}

src/FunctionDefaultParameter.kt

@@ -0,0 +1,14 @@
+fun hello(firstName: String, lastName: String? = null) {
+    if (lastName == null) {
+        println("Hello $firstName")
+    } else {
+        println("Hello $firstName $lastName")
+    }
+}
+
+fun main() {
+    hello("Eko")
+    hello("Eko", "Kurniawan")
+    hello("Budi")
+    hello("Joko", "Nugroho")
+}

src/FunctionInfixNotation.kt

@@ -0,0 +1,12 @@
+infix fun String.to(type: String): String {
+    if (type == "UP") {
+        return this.toUpperCase()
+    } else {
+        return this.toLowerCase()
+    }
+}
+
+fun main() {
+    val result = "Eko Kurniawan" to "LO"
+    println(result)
+}

src/FunctionNamedArgument.kt

@@ -0,0 +1,16 @@
+fun fullName(
+    firstName: String,
+    middleName: String,
+    lastName: String
+) {
+    println("Hello $firstName $middleName $lastName")
+}
+
+fun main() {
+    fullName("Eko", "Kurniawan", "Khannedy")
+    fullName(
+        lastName = "Khannedy",
+        firstName = "Eko",
+        middleName = "Kurniawan"
+    )
+}

src/FunctionParameter.kt

@@ -0,0 +1,13 @@
+fun sayHello(firstName: String, lastName: String?) {
+    if (lastName == null) {
+        println("Hello $firstName")
+    } else {
+        println("Hello $firstName $lastName")
+    }
+}
+
+fun main() {
+    sayHello("Eko", "Kurniawan")
+    sayHello("Budi", null)
+    sayHello("Joko", "Nugraha")
+}

src/FunctionReturnType.kt

@@ -0,0 +1,27 @@
+fun jumlahkan(a: Int, b: Int): Int {
+    val total = a + b
+    return total
+}
+
+fun bagi(a: Int, b: Int): Int {
+    if (b == 0) {
+        return 0
+    } else {
+        val result = a / b
+        return result
+    }
+}
+
+fun main() {
+    println(jumlahkan(10, 10))
+    println(jumlahkan(100, 100))
+
+    val result = jumlahkan(200, 200)
+    println(result)
+
+    val result2 = jumlahkan(5, 5)
+    println(result2)
+
+    println(bagi(100, 10))
+    println(bagi(100, 0))
+}

src/FunctionScope.kt

@@ -0,0 +1,19 @@
+
+
+fun satu(){
+    // error
+    // contohHelloWorld()
+}
+
+fun dua(){
+    // error
+    // contohHelloWorld()
+}
+
+fun main() {
+    fun contohHelloWorld(){
+        println("Hello World")
+    }
+
+    contohHelloWorld()
+}