From 56f41ecc22fb107d8e7f989f58440c191e211ffc Mon Sep 17 00:00:00 2001
From: LordBaryhobal <lordbaryhobal@gmail.com>
Date: Thu, 20 Mar 2025 07:48:36 +0100
Subject: [PATCH] added assignment 5 ex 1

---
 README.md                     |  8 ++++++++
 src/Assignment5/HOFOnLists.sc | 18 ++++++++++++++++++
 2 files changed, 26 insertions(+)
 create mode 100644 src/Assignment5/HOFOnLists.sc

diff --git a/README.md b/README.md
index 2c92f31..06990a4 100644
--- a/README.md
+++ b/README.md
@@ -81,3 +81,11 @@
 - Binary tree
 - List functions
 - Predicates (any / every)
+
+### Assignment 5 - High-order functions on lists
+[Files](src/Assignment5)
+- High-order functions
+- Lists
+- Map
+- Fold
+- Zip
\ No newline at end of file
diff --git a/src/Assignment5/HOFOnLists.sc b/src/Assignment5/HOFOnLists.sc
new file mode 100644
index 0000000..f146b6e
--- /dev/null
+++ b/src/Assignment5/HOFOnLists.sc
@@ -0,0 +1,18 @@
+def lengthStrings(strings: List[String]): List[Int] = {
+  strings map (s => s.length)
+}
+
+def dup[T](elem: T, n: Int): List[T] = {
+  (1 to n).toList map (_ => elem)
+}
+
+def dot(list1: List[Int], list2: List[Int]): List[Int] = {
+  list1 zip list2 map (p => p._1 * p._2)
+}
+
+assert(lengthStrings(List("How","long","are","we?")) == List(3, 4, 3, 3))
+
+assert(dup("foo", 5) == List("foo", "foo", "foo", "foo", "foo"))
+assert(dup(List(1,2,3), 2) == List(List(1,2,3), List(1,2,3)))
+
+assert(dot(List(1,2,3), List(2,4,3)) == List(2,8,9))
\ No newline at end of file