finished ch8

Collection of Common Data Structs.md

@@ -9,7 +9,7 @@ choosing the right one is a skill that is developed over time
 ## Common Collections
 - [*Vector*](Vector.md) - allows for storing a variable number of values next to each other
 - [*String*](String.md) - a collection of characters
-- *Hash Map* - allows you to associate a value with a specific key
+- [*Hash Map*](Hash Map.md) - allows you to associate a value with a specific key
 	- Its particular implementation is a more general version of a general data struct called a map
 		- {
 		- 1: data,
@@ -17,3 +17,9 @@ choosing the right one is a skill that is developed over time
 		- 3: this is a map
 		- }
 
+
+# Summary
+Here are some exercise that should be able to solve after reading through some of the common collections in the std library
+- Given a list of integers, use a vector and return the median (when sorted, the value in the middle position) and mode (the value that occurs most often; a hash map will be helpful here) of the list.
+- Convert strings to pig latin. The first consonant of each word is moved to the end of the word and ay is added, so first becomes irst-fay. Words that start with a vowel have hay added to the end instead (apple becomes apple-hay). Keep in mind the details about UTF-8 encoding!
+ - Using a hash map and vectors, create a text interface to allow a user to add employee names to a department in a company; for example, “Add Sally to Engineering” or “Add Amir to Sales.” Then let the user retrieve a list of all people in a department or all people in the company by department, sorted alphabetically.