Functional Programming With C# 7.1

1

public class Rectangle

{

public int Length { get; set; }

public int Height { get; set; }

public void Grow(int length, int height)

{

Length += length;

Height += height;

// r.Length is 15, r.Height is 20,

// same instance of r

Functional Programming

With C# 7.1

CHEAT SHEET

Functional programming is a style that treats computation as the evaluation of

mathematical functions and avoids changing-state and mutable data.

Immutable Types

An object whose state cannot be modified after it is created, lowering the risk of side-effects.

https://dotnetfiddle.net/K928pP

public class ImmutableRectangle

Length = length;

Height = height;

}

public ImmutableRectangle Grow(int length,

int height) =>

new ImmutableRectangle(Length + length,

Height + height);

}

ImmutableRectangle r = new

ImmutableRectangle(5, 10);