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Solid OCP Swift

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6 views1 page

Solid OCP Swift

Uploaded by

Amazing Deals
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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let objEmp = Employee(httpHandler: HttpHandler(), parser: Parser(), databaseHandler: DatabaseHandler())

### 2. Open/Closed Principle (OCP):


2. **Open/Closed Principle (OCP):** Software entities (classes, modules, functions, etc.) should be open for
extension but closed for modification. You can add new features without changing existing code.

Example: Extensible Logging System

protocol Shape {
func calculateArea() -> Double
}

class Circle: Shape {

let radius: Double

init(radius: Double) {
self.radius = radius
}

func calculateArea() -> Double {


return Double.pi * radius * radius
}
}

class Triangle: Shape {

let base: Double


let height: Double

init(base: Double, height: Double) {


self.base = base
self.height = height
}

func calculateArea() -> Double {


return 1/2 * base * height
}

class Rectangle: Shape {

let width: Double


let height: Double

init(width: Double, height: Double) {


self.width = width
self.height = height
}

func calculateArea() -> Double {


return width * height
}
}

class AreaCalculator {
func area(shape: Shape) -> Double {
return shape.calculateArea()

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