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Liquibase preconditions are more advanced elements of changeset. However, they may help when there are discrepancies between databases on different environments. Check fifty eighth question of full-stack dev quiz to check if you understand preconditions.
A few days ago, a new version of Spring - Spring Framework 6 was made officially available. It is a major upgrade as it utilizes the JDK 17 features. Spring 6 also comes with support of Jakarta EE 9, which means Tomcat 10.1 will work seamlessly with Spring Framework.
With Liquibase, you can easily not only add a column to a table, but you can also do some more complex operations. This time I will show you how to add a column conditionally, if it does not exist, yet. To achieve this task, I will use preConditions tag from Liquibase.
Are you as good as a Java compiler? Look at this code and say what it does. Check fifty seventh question of full-stack dev quiz to check if you know the joining collector.
One of the most common programmatic tasks in Java is to join String array to a single String. It might be useful for logging an array content, or to build an SQL query, or for many more reasons. The point is - there is no single convenient solution supported by the language, but there are many options to concatenate multiple Strings into one. In this post, I will show you a few such options and I will execute simple performance tests to compare their efficiencies.
In October 2022, Google announced joining Eclipse Adoptium Working Group. It is a significant step forward for Adoptium. That move will definitely increase popularity of Eclipse Temurin JDK as one of many Java Development Kit distributions.
Construtors in Java have limitations. Not everything is possible in them. Check fifty sixth question of full-stack dev quiz to check if you know what they are.
Constructors in Java classes work well when they are simple. With growing complexity, the code becomes less readable. It gets worse and worse until it reaches a point when Java itself says enough! and rejects it. Can you put complex logic to a constructor? Is a static factory method an alternative?
Asynchronous operations can be tricky in programming. Check fifty fith question of full-stack dev quiz to see what you know about sending HTTP GET requests in Angular TS and reading the response.
