Join with SelectMany - C# Tutorial

Contents

• Introduction Introduction

  • Functional programming patterns

    52s
  • What you should know

    2m 3s
  • Working with GitHub

    1m 20s
• 1. Overview 1. Overview

  • Overview of the functional programming concepts?

    7m 24s
• 2. Favor Pure Functions 2. Favor Pure Functions

  • Write pure functions for better code

    4m 2s
  • Example of an impure function

    1m 41s
  • Refactor impure function to pure

    2m 22s
  • Reduce code side effects

    2m 24s
  • Don't mutate input arguments

    1m 56s
  • Use an immutable argument

    3m 48s
• 3. Immutable Types 3. Immutable Types

  • Principles of immutable types

    2m 45s
  • Read-only properties

    5m 31s
  • Instance method in immutable type

    3m 14s
  • Use helper methods to create new instance

    2m 23s
  • Use factory method to create instance

    3m 33s
• 4. Side Effects and I/O 4. Side Effects and I/O

  • Work with files

    5m 11s
  • Calculate the total in pure function

    3m 54s
  • Randomness in functional programming

    2m 34s
• 5. Choose Expressions 5. Choose Expressions

  • Why expressions are better for functional programs

    3m 20s
  • Rewrite statements as expressions

    5m 39s
• 6. Functional Functions 6. Functional Functions

  • Use Func<T> for first-class functions

    3m 38s
  • Higher order functions

    6m 55s
• 7. Function Composition and Pipelining 7. Function Composition and Pipelining

  • Composition patterns

    3m 32s
  • Compose functions

    4m 49s
  • Pipelining with extension methods

    2m
  • Pipelining with generic methods

    2m 17s
  • Pipelining with IEnumerable

    4m 23s
• 8. Work with Lists 8. Work with Lists

  • Understand map and other concepts

    2m 26s
  • Map with LINQ select

    4m 50s
  • Filter with LINQ where

    2m 26s
  • Flatten with SelectMany

    2m 40s
  • Join with SelectMany

    1m 36s
  • Fold with Sum and Aggregate

    4m 51s
• Conclusion Conclusion

  • Next steps

    2m 36s