added lesson 7

README.md

@@ -57,13 +57,6 @@
 [Files](src/Lesson5)
 - Lists
 - High order functions
-- 
-### Lesson 6 - Tuples and comprehensions
-[Files](src/Lesson6)
-- Tuples
-- For-comprehension
-- Yield
-- Flatmap
 
 ### Midterm preparation
 [Files](src/MidTermPrep1)
@@ -71,6 +64,20 @@
 ### Midterm
 [Files](src/MidTerm1)
 
+### Lesson 6 - Tuples and comprehensions
+[Files](src/Lesson6)
+- Tuples
+- For-comprehension
+- Yield
+- Flatmap
+
+### Lesson 7 - Advanced typing and infinite lists
+[Files](src/Lesson7)
+- Types
+- Bounds
+- Traits
+- Variance, covariance and contra-variance
+- Infinite sequences
 
 ## Assignments
 
@@ -105,4 +112,9 @@
 - Lists
 - Map
 - Fold
-- Zip
+- Zip
+
+### Assignment 6 - Sequence comprehension and tuples
+[Files](src/Assignment6)
+- Tuples
+- `for` comprehension