COS 470 - Tuesday 2019-09-10

Objectives

Ensure student success on assignment 1

Notes

Progress/questions on assignment 1

Class

Topics
- Delegates
- linq
- git
Review assignment mistakes
Delegates (we touched on this, but we'll do it again next class)
- Anonymous functions
  - Func<,>
  - Action<>
- Lambda expressions: a => a % 2 == 0
  - as a function definition
  - as a parameter
  - as a variable
  - multiple parameters
- closure magic
- Questions?
System.Linq
- Fluent Syntax
  - Extension functions, this
- where (e or (e,i))
- orderBy (descending)
- groupBy
- reverse
- take
- zip
- first (or default)
- last (or default)
- group by
- Aggregate
  - Sum
  - min
  - max
  - average
  - count (vs count())
  - default if empty
- To...
  - Dictionary
  - Array
  - List
- Linq exercises
Mentioned: Unit tests
Mentioned: Debug Arguments
Mentioned: Config file