fixed minor issue in midterm

src/MidTerm1/Ex2.sc

@@ -24,6 +24,13 @@ def predicates[T](list: List[T])(preds: List[T => Boolean]): List[T] = {
   })
 }
 
+/*
+// Better solution
+def predicates[T](list: List[T])(preds: List[T => Boolean]): List[T] = {
+  preds.foldLeft(list)((acc, fun) => acc.filter(fun))
+}
+*/
+
 def fixedPoint(f: Int => Int): Int => Int = {
   @tailrec
   def func(x: Int): Int = {

src/MidTerm1/Ex3.sc

@@ -16,7 +16,7 @@ abstract class Text {
   def tail: Text = {
     this match {
       case Chars(cs) => Chars(cs.tail)
-      case Concat(t1, t2) => if (t2.isEmpty) t1.tail else Concat(t1, t2.tail)
+      case Concat(t1, t2) => if (t1.isEmpty) t2.tail else Concat(t1.tail, t2)
     }
   }
   def map(f: Char => Char): Text = {