corrected / added midterm examples

src/MidTerm1/Ex2.sc

@@ -24,6 +24,16 @@ def predicates[T](list: List[T])(preds: List[T => Boolean]): List[T] = {
   })
 }
 
+val l1 = (1 to 10).toList
+val f1 = ((a: Int) => a % 2 == 0)
+val f2 = ((a: Int) => a > 5)
+predicates(l1)(List(f1, f2))  // List(6, 8, 10)
+
+val l2 = ("Hello Scala Echo").toList
+val f4 = ((a: Char) => a == 'a' || a == 'e' || a == 'o')
+val f3 = ((a: Char) => !a.isUpper)
+predicates(l2)(List(f3, f4))  // List('e', 'o', 'a', 'a', 'o')
+
 /*
 // Better solution
 def predicates[T](list: List[T])(preds: List[T => Boolean]): List[T] = {
@@ -41,4 +51,5 @@ def fixedPoint(f: Int => Int): Int => Int = {
   func
 }
 
-fixedPoint(x => x / 2 + 5)(40)
+fixedPoint(x => if (x % 10 == 0) x else x + 1)(35)  // 40
+fixedPoint(x => x / 2 + 5)(20)  // 10