FFN

lambdaswithcollectioNEx.kt

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+fun main(){
+
+    //1
+    val listOfInt = listOf(1,2,3,4,5,6,7,8,9,10)
+    val doubleresult = listOfInt.map {it *2}
+    println(doubleresult)
+
+    //2
+    val names = listOf("Alice", "Bob", "Amir", "Charlie", "Annie", "David")
+    val filteredResult = filterNames(names) { it.startsWith("A") }
+    println(filteredResult)
+
+    //3
+    val words = listOf("apple", "banana", "kiwi", "strawberry", "grape")
+    val result = words.sortedByDescending{it.length}
+    println(result)
+
+    //4
+    fun customFilter(numbers : List<Int> , filter: (Int)-> Boolean) : List<Int>{
+        return numbers.filter(filter)
+    }
+    val mylist = listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
+
+    val numbersGreaterThanFifteen = customFilter(mylist) { it > 5 }
+    println(numbersGreaterThanFifteen)
+
+    val evenNumbers = customFilter(mylist) {it % 2 ==0}
+    println(evenNumbers)
+
+    val oddNumbers = customFilter(mylist) { it % 3 == 0}
+    println(oddNumbers)
+
+
+    //5
+    fun processNumbers(num : List<Int>): List<Int> {
+        return num
+            .filter { it % 2 != 0 }
+            .map { it * it }
+    }
+    val mylist2 = listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
+    val resultOfProcessNumbers = processNumbers(mylist2)
+    println(resultOfProcessNumbers)
+
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+}
+//2
+fun filterNames (names: List<String>, condition: (String) -> Boolean): List<String> {
+    return names.filter(condition)
+
+}
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