Completed Coursera: Kotlin for developers course

src/Lambdas.kt

@@ -0,0 +1,35 @@
+fun main() {
+    listOf(1, 2, 3)
+        // Lambda, it is inferred argument, only used for single argument lambdas
+        .filter { it % 2 == 0 }
+        // Explicitly define args
+        .map { value -> value * value }
+
+    mapOf(1 to 2)
+        // Automatic destructuring of mep entries
+        .mapValues { (key, value) -> "$key $value" }
+}
+
+fun returnFromLambda(): List<Int> {
+    return listOf(3, 0, 5)
+        .flatMap {
+            if (it == 0) return emptyList() // Returns from the function, will always return an empty list when 0
+            listOf(it, it)
+        }
+}
+
+fun returnFromLambda2(): List<Int> {
+    return listOf(3, 0, 5)
+        .flatMap {
+            if (it == 0) return@flatMap emptyList() // Returns from the lambda
+            listOf(it, it)
+        }
+}
+
+fun returnFromLambda3(): List<Int> {
+    return listOf(3, 0, 5)
+        .flatMap l@{ // Define custom label
+            if (it == 0) return@l emptyList() // Returns from the lambda
+            listOf(it, it)
+        }
+}