Future Of DotNet

Partitions
- Take
    numbers.Take(3)
- Skip
    numbers.Skip(4)
- TakeWhile
    numbers.TakeWhile(n => n < 6)
- SkipWhile
    numbers.SkipWhile(n => n % 3 != 0)


Orderings
- OrderBy
    orderby word
- Custom Comparer
    words.OrderBy(a => a, new CaseInsensitiveComparer())
- OrderBy ~ Descending
    orderby d descending
- ThenBy
    orderby degit.Length, digit
    words.OrderBy(a => a.Length).ThenBy(a => a, new CaseInsensitiveComparer())
- Reverse
    .Reverse()

https://youtu.be/K8V7_UDWfQs

Projections 
- select
- anonymous type
- tuple type
- where & select
- Multiple Sequences
- Child Sequence, Select Many
- Multiple where
- Indexed Select Many
- Practice
https://youtu.be/5Rq-ZvUvfOc

What is LINQ
- Language Integrated Query
- 다른 소스 및 Type에서 데이터를 검색하고 활용하기 위한 표현식
- 컬렉션, Ado.NET, DataSet, XML Docs, 웹 서비스 및 MS SQL Server 및 기타 데이터베이스등 다양한 데이터 소스에서 검색 및 활용이 가능
- 101 LINQ samples

LINQ Basic

LINQ Basic Keywords
- from : 쿼리 표현식은 from으로 시작해야함
- in : 4가지 경우에 사용되며 일반적으로 from과 함께 사용
- let : 쿼리식에서 하위절의 결과를 저장하여 후속절에서 사용하는 것이 유용한 경우에 let 키워드를 사용하여 새로운 로컬 변수를 만들어서 다양하게 활용이 가능
- into : group, join or select 절의 결과를 저장하는 임시 식별자를 만들수 있음
- on : join 절에서 결합 조건을 지정하는데 사용
- equals : join 절에서 두 시쿼스의 요소를 비교하는데 사용

Restrictions 제한
- Where


https://youtu.be/ci2U1cG6TvI

UNO Platform에 대해서 알아보도록 하겠습니다.

원본 동영상 https://m.youtube.com/watch?v=NHFbPItDaDc

1. 크로스 플랫폼 개발용

2. Xamarin.Forms와 차이점

3. Uno Platform

- Port of Universal Windows Platform(UWP) API and XAML to iOS/Android/WASM/macOS

- Written in C#(with bits of Java and JavaScript)

- 1:1 compatibility with UWP XAML, existing skills consistent UI

- Free and open source - https://platform.uno/

4. Uno Platform UI comparison

5. Supported platforms

6. Uno UI

7. Uno - UI? Not only!

8. Uno Platform Prerequisites

- Visual Studio 2019 for Windows

. Universal Windows Platform

. Mobile development with .NET

. ASP.NET and Web

- macOS for iOS build host

- Uno Platform Solution Templates Visual Studio Extension

9. DEMO

10. Call to action

https://youtu.be/li47OqE0tNI

기본 사용방법 설명

Constructor Injection – 생성자 주입

- Resolve시에 기본으로 사용하는 방식
- private readonly T _instance; 를 이용해서 내부에서 사용
- Multiple Parameters
  public Driver(ICar car, ICarKey key)
  private readonly ICar _car;
- Multiple Constructors
  [InjectionConstructor] public Driver(ICar car)
  public Driver(string name)
- Primitive Type Parameter
  public Driver(ICar car, string driverName)

https://youtu.be/UHrrIDBubdg

UnityContainer Detail & Examples - Prism으로 시작하는 UWP app part15 - 2

Property Injection

- Attribute를 이용해서 Injection
- public T Instance { get; set;} 을 이용
- Dependency Attribute
  [Dependency] public ICar Car { get; set; }
- Named Mapping
  [Dependency("MyCar")] protected ICar Car { get; set; }
- Run-time Configuration
  public ICar MyCar { get; set; }
  unityContainer.RegisterType<IDriver, UWPDriverRuntime>(new InjectionProperty("MyCar", new BMW()));


Method Injection

- Attribute를 이용해서 Injection
- private readonly T _instance; 를 이용해서 내부에서 사용
- 생성자를 이용할 수 없는 경우 사용
- InjectionMethod Attribute
  [InjectionMethod] public void UseCar(ICar car) { _car = car; }
- Run-time Configuration
  public void MyCar(ICar car) { _car = car; }
  unityContainer.RegisterType<IDriver, UWPDriverRuntimeMethod>(new InjectionMethod("MyCar", new Audi()));


Overrides

- 등록된 Type이외의 Type을 Injection 시키는 방법
- ResolverOverride를 이용해서 등록된 Type을 재정의 할 수 있음
- ParameterOverride
  unityContainer.Resolve(
  new ParameterOverride("car", new BMW()));
  Override Multiple Parameters
  new ParameterOverrides {  { "car1", new Audi() },
                         { "carKey1", new AudiKey() }, 
                         { "car2", new BMW() },                 
                         { "carKey2", new BMWKey() }}
- PropertyOverride
  unityContainer.Resolve(new PropertyOverride("Car", new BMW()));
- DependencyOverride
  unityContainer.Resolve(new DependencyOverride(typeof(ICar), new BMW()));


Lifetime Manager

- UnityContainer에 등록된 객체에 대한 수명을 관리하는 방법을 지정할 수 있음
1. TransientLifetimeManager
   기본 수명 관리 방법, Resolve호출시 새로운 객체를 생성해서 반환
2. ContainerControlledLifetimeManager
   처음 Resolve시 싱글톤 객체를 생성하고, 이후 Resolve할 때마다 반환 
3. HierarchicalLifetimeManager
   2 항목과 동일, 추가로 하위 컨테이너가 자체 단일 객체를 만들어 반환 – 상위 컨테이너와 하위 컨테이너가 서로 다른 객체 관리
4. PerResolveLifetimeManager
   1 항목과 동일, 재귀호출시 생성된 객체는 재사용함
5. PerThreadLifetimeManager
   스래드당 단일 객체를 생성
6. ExternallyControlledLifetimeManager
   생성된 객체에 대한 약한 참조만 유지. 사용자 정의 수명관리자를 만들어서 사용할 수 있음

https://youtu.be/fQunFpAvTsg

소스

https://github.com/kaki104/PrismSample2019