Problem 22

src/main/scala/ninetyNineScalaProblems/Problem22.scala

@@ -0,0 +1,14 @@
+package ninetyNineScalaProblems
+
+import scala.annotation.tailrec
+
+object Problem22:
+    def range(start: Int, stop: Int): List[Any] =
+        @tailrec
+        def loop(cursor: Int, acc: List[Any]): List[Any] =
+            cursor match
+                case c if c <= stop =>
+                    loop(cursor + 1, cursor :: acc)
+                case c if c > stop =>
+                    acc
+        loop(start, List()).reverse

src/test/scala/ninetyNineScalaProblems/Problem22Suite.scala

@@ -0,0 +1,15 @@
+package ninetyNineScalaProblems
+
+import scala.compiletime.ops.boolean
+
+class Problem22Suite extends munit.FunSuite:
+    List(
+        ((1, 0), List()),
+        ((1, 1), List(1)),
+        ((1, 2), List(1, 2)),
+        ((1, 5), List(1, 2, 3, 4, 5)),
+        ((0, 1), List(0, 1)),
+    ).foreach:
+        case ((start, stop), expected) =>
+            test(s"range returns [$expected]"):
+                assertEquals(Problem22.range(start, stop), expected)