New samples from kotlin-web-site (#721)

* test(samples): add new samples

---------

Co-authored-by: kotlin-samples-pusher-bot <bot@samples.kotlin.com>
Co-authored-by: Dmitrii Krasnov <dmitrii.krasnov@jetbrains.com>

Author: 3 people

src/test/kotlin/com/compiler/server/ResourceE2ECompileTest.kt

@@ -64,6 +64,8 @@ class ResourceE2ECompileTest : BaseResourceCompileTest {
                         """.trimIndent()
                     }
 
+                    // TODO(Dmitrii Krasnov): this code ignores some of errors,
+                    //  it would be nice to rewrite it.
                     println("!!! file: ${file.path} not equals but it's random code")
                 }
             } else {

src/test/resources/test-compile-data/jvm/kotlin-by-example/01_Hello world/0c66b958dea3212426eff8cba77117c6.2.kt

@@ -1,6 +1,6 @@
 fun main() {
 //sampleStart
-    // Creates an array of Int of size 5 with values
+    // Creates an array of Int of size 5 with the values initialized to zero
     val exampleArray = IntArray(5)
     println(exampleArray.joinToString())
     // 0, 0, 0, 0, 0

src/test/resources/test-compile-data/jvm/kotlin-web-site/arrays/23031df00534726bea3f25bea3d46032.12.kt

@@ -1,7 +1,10 @@
 fun main() {
 //sampleStart
-    var x = 5 // `Int` type is inferred
+    // Declares the variable x and initializes it with the value of 5
+    var x: Int = 5
+    // Reassigns a new value of 6 to the variable x
     x += 1
+    // 6
 //sampleEnd
-    println("x = $x")
+    println(x)
 }

src/test/resources/test-compile-data/jvm/kotlin-web-site/basic-syntax/5ec261721162729866abc1e8f7293ef4.10.kt

@@ -1,15 +1,8 @@
+fun main() {
 //sampleStart
-val PI = 3.14
-var x = 0
-
-fun incrementX() { 
-    x += 1 
-}
+    // Declares the variable x with the value of 5;`Int` type is inferred
+    val x = 5
+    // 5
 //sampleEnd
-
-fun main() {
-    println("x = $x; PI = $PI")
-    incrementX()
-    println("incrementX()")
-    println("x = $x; PI = $PI")
+    println(x)
 }

src/test/resources/test-compile-data/jvm/kotlin-web-site/basic-syntax/5ec261721162729866abc1e8f7293ef4.11.kt

@@ -1,9 +1,14 @@
-class Rectangle(val height: Double, val length: Double) {
-    val perimeter = (height + length) * 2 
-}
 fun main() {
 //sampleStart
-    val rectangle = Rectangle(5.0, 2.0)
-    println("The perimeter is ${rectangle.perimeter}")
+    // Initializes the variable x at the moment of declaration; type is not required
+    val x = 5
+    // Declares the variable c without initialization; type is required
+    val c: Int
+    // Initializes the variable c after declaration 
+    c = 3
+    // 5 
+    // 3
 //sampleEnd
+    println(x)
+    println(c)
 }

src/test/resources/test-compile-data/jvm/kotlin-web-site/basic-syntax/5ec261721162729866abc1e8f7293ef4.12.kt

@@ -1,12 +1,18 @@
-fun main() {
 //sampleStart
-    var a = 1
-    // simple name in template:
-    val s1 = "a is $a" 
-    
-    a = 2
-    // arbitrary expression in template:
-    val s2 = "${s1.replace("is", "was")}, but now is $a"
+val PI = 3.14
+var x = 0
+
+fun incrementX() {
+    x += 1
+}
+// x = 0; PI = 3.14
+// incrementX()
+// x = 1; PI = 3.14
 //sampleEnd
-    println(s2)
+
+fun main() {
+    println("x = $x; PI = $PI")
+    incrementX()
+    println("incrementX()")
+    println("x = $x; PI = $PI")
 }

src/test/resources/test-compile-data/jvm/kotlin-web-site/basic-syntax/5ec261721162729866abc1e8f7293ef4.13.kt

@@ -1,13 +1,7 @@
-//sampleStart
-fun maxOf(a: Int, b: Int): Int {
-    if (a > b) {
-        return a
-    } else {
-        return b
-    }
+class Rectangle(val height: Double, val length: Double) {
+    val perimeter = (height + length) * 2 
 }
-//sampleEnd
-
 fun main() {
-    println("max of 0 and 42 is ${maxOf(0, 42)}")
+    val rectangle = Rectangle(5.0, 2.0)
+    println("The perimeter is ${rectangle.perimeter}")
 }

src/test/resources/test-compile-data/jvm/kotlin-web-site/basic-syntax/5ec261721162729866abc1e8f7293ef4.14.kt

@@ -1,7 +1,12 @@
+fun main() {
 //sampleStart
-fun maxOf(a: Int, b: Int) = if (a > b) a else b
+    var a = 1
+    // simple name in template:
+    val s1 = "a is $a" 
+    
+    a = 2
+    // arbitrary expression in template:
+    val s2 = "${s1.replace("is", "was")}, but now is $a"
 //sampleEnd
-
-fun main() {
-    println("max of 0 and 42 is ${maxOf(0, 42)}")
+    println(s2)
 }

src/test/resources/test-compile-data/jvm/kotlin-web-site/basic-syntax/5ec261721162729866abc1e8f7293ef4.15.kt

@@ -1,8 +1,13 @@
-fun main() {
 //sampleStart
-    val items = listOf("apple", "banana", "kiwifruit")
-    for (item in items) {
-        println(item)
+fun maxOf(a: Int, b: Int): Int {
+    if (a > b) {
+        return a
+    } else {
+        return b
     }
+}
 //sampleEnd
+
+fun main() {
+    println("max of 0 and 42 is ${maxOf(0, 42)}")
 }