diff -r 72f7dd1a3754 -r ead6089209ba progs/lecture2.scala
--- a/progs/lecture2.scala	Fri Nov 17 02:13:40 2017 +0000
+++ b/progs/lecture2.scala	Fri Nov 17 09:13:03 2017 +0000
@@ -2,7 +2,7 @@
 //=================
 
 
-// Overloaded math operations
+// the pain with overloaded math operations
 
 (100 / 4)
 
@@ -265,6 +265,17 @@
 // ... 
 
 
+// an aside: partial application
+
+def add(a: Int)(b: Int) : Int = a + b
+
+sum(add(2), 0, 2)
+sum(add(10), 0, 2)
+
+def add2(a: Int, b: Int) : Int = a + b
+sum(x => add2(2, x), 0, 2)
+sum(x => add2(10, x), 0, 2)
+
 // Function Composition
 //======================
 
@@ -312,14 +323,6 @@
 
 
 
-// Type abbreviations
-//====================
-
-// some syntactic convenience
-
-type Pos = (int, Int)
-type Board = List[List[Int]]
-
 
 
 // Implicits (Cool Feature)
@@ -530,6 +533,14 @@
 time_needed(10, count_intersection2(A, B))
 
 
+// Type abbreviations
+//====================
+
+// some syntactic convenience
+
+type Pos = (int, Int)
+type Board = List[List[Int]]
+