Merge pull request eugenp#5853 from alimate/BAEL-2377

diegomoreira001 · web-flow · commit 18ff18671ba0 · 2018-12-07T09:37:29.000-03:00
Added a simple Kotlin function for bytecode inspection as part of the Inline Functions tutorial.
diff --git a/core-kotlin/src/main/kotlin/com/baeldung/functions/Inline.kt b/core-kotlin/src/main/kotlin/com/baeldung/functions/Inline.kt
@@ -0,0 +1,28 @@
+package com.baeldung.functions
+
+import kotlin.random.Random
+
+/**
+ * An extension function on all collections to apply a function to all collection
+ * elements.
+ */
+fun <T> Collection<T>.each(block: (T) -> Unit) {
+    for (e in this) block(e)
+}
+
+/**
+ * In order to see the the JVM bytecode:
+ *  1. Compile the Kotlin file using `kotlinc Inline.kt`
+ *  2. Take a peek at the bytecode using the `javap -c InlineKt`
+ */
+fun main() {
+    val numbers = listOf(1, 2, 3, 4, 5)
+    val random = random()
+
+    numbers.each { println(random * it) } // capturing the random variable
+}
+
+/**
+ * Generates a random number.
+ */
+private fun random(): Int = Random.nextInt()
