Praveer Gupta

Stream API was introduced in Java 8. It provided a declarative programming approach to iterate and perform operations over a collection. Until Java 7, for and for each were the only options available, which was an imperative programming approach. In this article I will introduce you to the Stream API... [Read More]

In this article I will show how one can perform offline installation of Python packages and Ruby gems. For Python packages I will be using pip and cached wheels. For Ruby gems I will be using RubyGems. [Read More]

In this article I will show how existing interfaces can be extended to provide additional features by using the Function interface, introduced in Java 8, without breaking existing code. I will show, through practical examples, the usages of the apply, compose and andThen methods from the Function interface. [Read More]

I will be covering the features of the Java 8’s Date Time API from a practical standpoint, which means those features that a developer uses on a daily basis. This API was introduced as part of the JSR-310. In addition to improvements over existing Date and Calendar in representing date... [Read More]

I have created a video, in which I show how easy it is to spring up an application quickly with Spring Boot. [Read More]

I have been writing code for several years now. One thing that I have realized is that I have spent much more time in reading code than writing code. Hence, as a part of continuous improvement, I invest a lot of time in learning new techniques to write clean code.... [Read More]

Java 8, among other changes, had introduced CompletableFuture which has made writing asynchronous programs in Java easy. In this article I will be using CompletableFuture to explain how asynchronous programs are written and what value asynchronous programs bring in the context of backend services’ response times. I will also be... [Read More]

I started year 2016 with reading a book that I came across while I was searching for a book that would benefit me as a developer. I am glad I read this book. This book has not only helped me professionally, but also personally. This is one of the most... [Read More]

Lately there has been lot of discussions around functional programming and object oriented programming and their differences. A few functional programming constructs had also been introduced in Java 8 release a couple of years back. Since then I have been exploring functional programming and I have realized that using a... [Read More]

The format of error responses from REST web services has always been a topic of grey area for me. According to me, whatever format you choose, it should give enough information to the clients, consuming the REST web services, so that the clients can handle the error situations gracefully. Spring... [Read More]