Ali Aljadi

src/Main.kt

@@ -1,3 +1,39 @@
 fun main() {
-    println("Hello World!")
-}
+    // Part 1
+    val numbers = (1..10).toList()
+    val numbersDoubled = numbers.map {it * 2}
+    println(numbersDoubled)
+    // Part 2
+    val names = listOf("Alice", "Bob", "Amir", "Charlie", "Annie", "David")
+    val namesStartingWithA = filterNames(names) {it.startsWith("A")}
+    println(namesStartingWithA)
+    // Part 3
+    val words = listOf("apple", "banana", "kiwi", "strawberry", "grape")
+    val sortedWordsDescending = {listOfWords: List<String> -> listOfWords.sortedByDescending { it.length }}
+    println(sortedWordsDescending(words))
+    // Part 4
+    println(customFilter(numbers){ it > 5 })
+    println(customFilter(numbers){ it % 2 == 0 })
+    println(customFilter(numbers){ it % 3 == 0 })
+    // Part 5
+    println(processNumbers(numbers))
+    // Bonus
+    val processedNumbers_Bonus = processNumbers_Bonus(numbers, { it % 2 != 0 })  { it * it}
+    println(processedNumbers_Bonus)
+}
+// For Part 2
+fun filterNames(names: List<String>, filterByFirstLetter: (String) -> Boolean): List<String>{
+    return names.filter(filterByFirstLetter)
+}
+// For Part 4
+fun customFilter(numbers: List<Int>, filter: (Int) -> Boolean): List<Int>{
+    return numbers.filter(filter)
+}
+// Part 5
+fun processNumbers(numbers: List<Int>): List<Int>{
+    return numbers.filter { it % 2 != 0 }.map { it * it }
+}
+// Bonus
+fun processNumbers_Bonus(numbers: List<Int>, filterEvenNumbers: (Int) -> Boolean, squareNumbers: (Int) -> Int): List<Int>{
+    return numbers.filter(filterEvenNumbers).map(squareNumbers)
+}