Swift closure is a miniature block of code, like a pocket-sized function, that you can carry around and hand out whenever needed. It’s a self-contained chunk of functionality that can be assigned to variables, passed as arguments, and even returned from other functions. Also, closures in Swift are similar to blocks in Objective-C and other…
Read More Swift Closure: A Detailed Guide For BeginnersIn this tutorial, you will learn how to create Swift functions with Default Parameters. This concept might sound a bit fancy, but don’t worry – I’ll break it down into bite-sized pieces to make it easier to understand. Understanding Default Parameters in Swift In Swift, a default parameter is like a safety net for your…
Read More Functions With Default Parameters in SwiftAdding items to a dictionary is easy, but understanding the options and best practices can make your code cleaner and more efficient. This tutorial will guide you through the various ways to add items to a Swift dictionary, from the simplest syntax to more advanced techniques. 1. Add Item to Dictionary Using Subscript Syntax This…
Read More Add Item to a Dictionary in SwiftDictionaries in Swift are like containers that hold pairs of information: a key and its corresponding value. Think of them as organized lists where each item has a unique label (key) associated with some data (value). In this tutorial, you will learn how to create a new, empty dictionary in Swift. There are a few…
Read More Create an Empty Dictionary in SwiftIn this tutorial, you will learn how to implement Kafka Producer in a Spring Boot Microservice. A Kafka Producer is an application that sends messages to a Kafka topic, which can be consumed by other microservices. You will use Spring for Apache Kafka dependency to configure and create a Kafka Producer in your Spring Boot…
Read More Kafka Producer in Spring Boot MicroserviceIn this tutorial, you will learn how to create your first Kafka cluster. You will learn how to start three Kafka servers in a cluster using KRaft mode. If you want to run just one server in a cluster, then read “Start Apache Kafka Server in KRaft mode” tutorial. Starting more than one server in…
Read More Kafka Cluster: How to Start 3 Kafka Servers in a ClusterIn the previous tutorial, I explained how to create a function in Swift, and their importance in keeping the code modular and organized. Well, functions can also be written inside other functions, and Swift’s official documentation suggests this helps to encapsulate useful functionality within a nested function scope. In this tutorial you will learn how…
Read More Nested Functions in Swift: A Comprehensive GuideFunctions are a very important concept in programming. They allow us to write code once, and run it as many times as we want. As the official documentation states, “Functions are self-contained chunks of code that perform a specific task”. In this tutorial, you will learn how to create functions in Swift and how you can…
Read More Create a Function in SwiftIn this tutorial, you will learn how to produce and consume messages in order using the Kafka command-line interface (CLI). You will also learn how to use a key to group and identify the messages, and how to specify a separator between the key and the value. What is Kafka CLI? Kafka CLI is a…
Read More Kafka CLI: Produce and Consume Messages in OrderIn this tutorial, you will learn how to start Apache Kafka Server with KRaft, a new consensus protocol that replaces ZooKeeper for metadata management. KRaft simplifies Kafka’s architecture and improves its performance and stability. You can read more about KRaft here and here. Step 1: Generate a Cluster UUID Before you can start Apache Kafka server on your…
Read More How to Start Apache Kafka Server with KRaftIn this guide, you will learn more about Kafka Topic, the core structure for data within Kafka. You will learn how to create, manage, and utilize Kafka Topics effectively. Each step includes practical examples and straightforward explanations, ensuring a clear understanding. As you progress, you’ll gain essential skills and knowledge, focusing solely on Kafka Topics.…
Read More Apache Kafka Topic: A Comprehensive GuideIn this tutorial, you will learn how to install MySQL on Amazon EC2 Linux machine. If you’re new to this or have encountered issues with previous installations, you’re in the right place. If you want to learn how to run MySQL in a Docker container instead, then read this tutorial: How to start MySQL in…
Read More How to Install MySQL on Amazon EC2 LinuxKeeping sensitive data secure is essential, but it isn’t that easy in today’s world. If you are using the Spring Boot application and want to encrypt your credentials, such as DB passwords, server information, or personal data then the simplest way is to use Jasypt. What is Jasypt? Jasypt (Java Simplified Encryption) is a Java…
Read More Spring Boot Password Encryption Using JasyptIn this Swift tutorial, I’ll show you how to add new functionality to existing Swift classes using class extensions. It’s a powerful feature in Swift that lets you add your own methods or computed properties to already-defined classes, making them more versatile. Let’s start with a very simple example. Creating a Simple Extension In Swift,…
Read More Swift Class Extension ExplainedIn this tutorial, you will learn how to generate a custom JSON Web Token(JWT) and how to add and validate custom JWT Claims using the io.jsonwebtoken library. The JWT token generated in this tutorial will be signed with a SecretKey, making it secure and tamper-proof. Also, this tutorial assumes you have prior knowledge of creating…
Read More Generate JWT. Add and Validate Custom Claims.