This tutorial examines various methods for checking if a key exists in a Python dictionary. A dictionary in Python is an unordered collection of data values that serve as a mapping mechanism for storing and managing values. It consists of key-value pairs, where values are retrieved based on their corresponding keys. Dictionaries are widely used…
Read More Check if a Key exists in a Python dictionaryDependency injection is a design pattern in which a component’s dependencies are supplied externally rather than being hardcoded within the component itself. In Spring, developers mainly use 3 different types of dependency injection: constructor-based, setter-based, and field-based. In this tutorial, we will see how to use Setter-based Dependency Injection to inject a UsersRepository into a…
Read More Setter-based Dependency Injection in SpringLearning how to convert Java objects into JSON and vice versa can be very helpful for your work as a full-stack mobile app developer. In this blog post, I will share some code examples that will help you with the most common tasks you’ll encounter when working with JSON and Java. I will cover the…
Read More Convert Java into JSON and JSON into Java. All Possible Examples.Maven is a popular build tool for Java projects. It helps you manage dependencies, build and test your projects, and package them for distribution. Keeping Maven up-to-date is important to take advantage of the latest bug fixes and new features. If you do not have Maven installed on your computer, then read How to install…
Read More Upgrading Maven on macOSSpring is a popular Java-based framework for building applications. One of its core features is dependency injection, which is used to manage the relationships between objects and to make it easier to manage the dependencies in an application. In this tutorial, we will explore two of the main methods of dependency injection in Spring: constructor…
Read More Constructor vs Field Dependency Injection in SpringThis tutorial will teach you how to start your Spring Boot application on a random port number. Starting an application on a random port number is very helpful when you need to start multiple instances of the same Spring Boot application and then balance HTTP requests between the running instances. If you want to learn…
Read More Start Spring Boot App on a Random Port NumberIn this article, we will learn about Many-to-Many relationships in JPA and how to implement them in a Spring Boot application. Let’s get started! @ManytoMany annotation A many-to-many relationship occurs when multiple records in one table are associated with multiple records in another table. The @ManyToMany annotation is used to define a many-valued association with…
Read More Many-to-Many Relationship in Spring Boot Rest with JPADependency Injection is a design pattern that allows the separation of concerns in an application by removing the hard-coded dependencies between objects. In Dependency Injection, the objects are provided with their dependencies instead of having to hard-code them. This makes the application more flexible, maintainable, and easier to test. Spring Framework provides several ways to…
Read More Field-based Dependency Injection in SpringIn this guide, I will walk you through the Caching Abstraction in Spring Boot and how to improve the application’s performance. I will walk you through how to enable default caching in Spring Boot with an example of different use cases. What is Cache? A cache is a small and fast, efficient memory space that…
Read More Spring Boot Caching with ExamplesIn this tutorial, you will learn how to find the index of an element in a Python list. A list is an array. So if you are new to Python, treat the list the same as you treat an array in other programming languages. Python built-in index() function To find the index of an element…
Read More Python List index()In the previous lesson, we covered the conversion of a Decimal to Binary. Here, you will learn how to convert Binary to Decimal in Java. There are a couple of ways: Using the parseInt() method With custom logic Convert Binary to Decimal in Java using the parseInt() method We can use the parseInt(String s, int…
Read More Convert Binary to Decimal in JavaInstalling an SSL certificate on a Bitnami stack for Lightsail is a simple process that can be completed in just a few steps. In this blog post, we will walk you through the process of installing an SSL certificate on your Bitnami stack for Lightsail. You can use the generated SSL certificate for your LAMP…
Read More Install SSL certificate on Bitnami stack for LightsailAWS Lambda is a service that lets you run code without provisioning or managing servers. In this tutorial, I will share with you how to create a very simple Lambda function in Java and run it on AWS. Prerequisites To be able to follow this tutorial, you will need to have the following: An AWS account,…
Read More A Simple AWS Lambda Function in JavaIf you are new to programming or are coming from a programming language other than Python, you may be searching for the best way to determine if a Python string includes another string. There are several different methods to do this in Python. In this article, I will discuss all of the common methods for…
Read More Check if String contains a Substring in PythonIn this tutorial, you will learn how to download and start up Keycloak as a standalone server. What is Keycloak? Keycloak is an open-source identity and access management tool focusing on modern applications and services such as mobile applications, REST APIs, and single-page applications. How to Download Keycloak? To download the Keycloak go to the…
Read More Keycloak: Starting a Standalone Server