App Optimisation In swift Part One

 Part 1

Making functions private:

1. Encapsulation: By marking functions as private, you encapsulate the functionality, restricting access only to the containing scope (such as a class or extension). This helps in preventing unintended modifications or calls from other parts of the codebase, improving code reliability and stability.

2. Modularity: Private functions promote modular code design by hiding implementation details. This allows developers to focus on the interface provided by the public or internal functions without worrying about the internal workings of private functions.

3. Reduced Complexity: Private functions help in reducing the cognitive load by hiding implementation details that are not relevant to external users or callers of the code. This makes the codebase easier to understand and maintain.

4. Improved Security: Private functions can include sensitive logic or data manipulation that should not be exposed to external entities. By restricting access to these functions, you enhance the security of your codebase.

5. Code Optimization: The compiler can perform optimizations, such as inlining or dead code elimination, more effectively on private functions since their scope is limited. This can lead to better performance in some cases.

Overall, marking functions as private enhances code organization, readability, maintainability, and security, which are essential aspects of software development.

Example For Private Function

class BlogPost {

    private var content: String

    

    init(content: String) {

        self.content = content

    }

    

    func publish() {

        // Publish the blog post content

        print("Blog post published:\n\(content)")

        // Perform additional tasks like notifying subscribers, updating metadata, etc.

        updateMetadata()

    }

    

    private func updateMetadata() {

        // This function updates metadata related to the blog post

        print("Updating metadata...")

        // Code to update metadata such as date, author, tags, etc.

    }

}

In this example:

• The BlogPost class has a private property content to store the content of the blog post.
• The publish() method is a public function that publishes the blog post content. It also calls the private updateMetadata() method to update metadata related to the blog post.
• The updateMetadata() method is marked as private, indicating that it's only meant to be used internally within the BlogPost class. It updates metadata such as the publication date, author, tags, etc., but it's not exposed to external users of the class.

By making updateMetadata() private, you ensure that only the BlogPost class itself can call this method to update the metadata when publishing a blog post. External users of the class cannot directly access or call this method, maintaining encapsulation and ensuring that the metadata update logic remains internal to the class.