Barrak Mandani

src/Main.kt

@@ -1,3 +1,53 @@
+// Part 1
+// The function have 2 parameters operation and lambda
+// the lambda function will take 1 argument in this case String
+// and return a Boolean of if it's true or false, however the return type of the lambda is List<String>
+// when we apply the lambda function to the list it will return List<String>
+// Hence, it will return everything (List<String>) that's true  in our case names starts with A
+fun filterNames(names: List<String>, operation: (String) -> Boolean):List<String>{
+    return names.filter(operation)
+}
+
+// Part 4:
+fun customFilter(numbers: List<Int>, filter: (Int) -> Boolean): List<Int>{
+    return numbers.filter(filter)
+}
+
+// Part 5:
+fun processNumbers(numbers: List<Int>, filter: (Int) -> Boolean): List<Int>{
+    return numbers.filter(filter)
+}
+
 fun main() {
-    println("Hello World!")
+    // Part 1: Lambda with List Transformation
+    val numbers = listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
+    println("Part 1: ${numbers.map { it * 2 }}")
+
+    // Part 2: Filtering Strings with Lambda
+    val names = listOf("Alice", "Bob", "Amir", "Charlie", "Annie", "David")
+    val namesWithA = filterNames(names) { it.contains('A') }
+    println("Part 2: $namesWithA") // print final result
+
+    //Part 3: Sorting with Custom Lambda
+    val fruits = listOf("apple", "banana", "kiwi", "strawberry", "grape")
+    val fruitSortedByLength = fruits.sortedByDescending {it.length}
+    println("Part 3: $fruitSortedByLength")
+
+    // Part 4:
+    // Creating a variable to reduce code redundancy.
+    val numbersList = listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
+    println("Part 4: ${customFilter(numbersList){ it > 5 }}")
+    println("Part 4: ${customFilter(numbersList){ it % 2 == 0}}")
+    println("Part 4: ${customFilter(numbersList){ it % 3 == 0 }}")
+
+    // Part 5: Combining Lambdas
+    val processedNums = listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
+    val evenNums = processNumbers(processedNums){ it % 2 != 0} // filter out the even numbers
+    val squaredEvenNums = evenNums.map { it * it }
+    println("Part 5: $squaredEvenNums")
+
+
+
+
+
 }