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  • What Are Cookies in Servlets?

    What Are Cookies in Servlets?
    by Ram N

    In the video below, we take a closer look at Cookies in Servlets with examples. Let's get started! More

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  • Toying With Kotlin’s Context Receivers

    Toying With Kotlin’s Context Receivers
    by Nicolas Fränkel CORE

    Kotlin added the idea of Context Receivers in version 1.6.20. In this post, I'd like to toy with them to understand how useful they can be. Note that if you want to... More

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Instancio: Test Data Generator for Java (Part 2)

Instancio: Test Data Generator for Java (Part 2)
by Arman Sharif

In part 1, we introduced Instancio and how it can be used to automate data setup in unit tests. To recap, Instancio is a library that automates data setup in unit tests, with the goal...

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Debugging Java Collections Framework Issues in Production

Debugging Java Collections Framework Issues in Production
by Shai Almog CORE

The Java Collections Framework was a huge leap forward when it was introduced as part of Java 2 (JDK 1.2). Thanks to the included collection classes we finally moved beyond the limits...

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Understanding Cloud Computing

Refcard #082

Understanding Cloud Computing

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Design Patterns
Building Maintainable and Scalable Software
Learn design patterns quickly with Jason McDonald's outstanding tutorial on the original 23 Gang of Four design patterns, including class diagrams, explanations, usage info, and real world examples.
Jason McDonald
Core Java
A Power-User's Guide to Java
Gives you an overview of key aspects of the Java language and references on the core library, commonly used tools, and Java 8 features.
Cay Horstmann
Getting Started With Git
The De Facto Standard for Version Control
Today, Git is effectively the de-facto standard for software version control, and it is truly an expected tool in every developer’s toolbox. This quick overview demonstrates what a rich and deep DVCS Git truly is, while still being approachable for the newcomer to this collaborative approach to source code and version control. Download this Refcard to learn about the essentials of getting started with Git like cloning existing projects, pushing Git commits to subversion, branching and merging, and more.
Matthew McCullough
Foundations of RESTful Architecture
The Representational State Transfer (REST) architectural style is a worldview that elevates information into a first-class element of architectures. REST allows us to achieve the architectural properties of performance, scalability, generality, simplicity, modifiability, and extensibility. This newly updated Refcard explains main HTTP verbs, describes response codes, and lists libraries and frameworks. It also gives additional resources to further explore each topic.
Brian Sletten
Getting Started with Ajax
Unlocking Unobtrusive JavaScript
Introduces Ajax, a group interrelated techniques used in client-side web development for creating asynchronous web applications.
Dave Crane
Scrum
The Most Popular Agile Methodology
Scrum is a framework that allows people to productively and creatively deliver products of the highest possible value. With over 70% of Agile teams using Scrum or Scrum hybrid, learn more about its benefits in managing complex product development. This newly updated Refcard explores the details of Scrum, including theory, values, roles, and events. It also includes a sample of a popular approach to deliver Integrated Increments in a scaled environment.
Dave West
Core Java Concurrency
Understanding the Core Concurrency Concepts
This Refcard will help Java developers working with multi-threaded programs to understand core concurrency concepts and how to apply them. Overview the key aspects of the Java language and get references on the core library.
Igor Sorokin
Spring Configuration
Dependency Injection in a Nutshell
Catalogs the XML elements available as of Spring 2.5 and highlights those most commonly used: a handy resource for Spring context configuration.
Craig Walls
Core CSS: Part I
First Steps in CSS
Covers Core principles of CSS that will expand and strengthen your professional ability to work with CSS. Part one of three.
Molly Holzschlag
jQuery Selectors
The Core jQuery Reference
Introduces jQuery Selectors, which allow you to select and manipulate HTML elements as a group or as a single element in jQuery.
Bear Bibeault
Getting Started with Eclipse
Test and Debug Code With Java’s Leading IDE
Eclipse IDE is a cross-platform, multi-purpose, open-source Integrated Development Environment. It is widely used to develop projects in Java, JavaScript, PHP, C++, Scala, and many others. This newly updated Refcard breaks down installing, setting up, and getting started with Eclipse. It also covers productivity tips, creating new projects and files, accessing Source Control Managers, and debugging configurations.
Mickael Istria
Core CSS: Part II
Understanding Selectors
Covers Core principles of CSS that will expand and strengthen your professional ability to work with CSS. Part two of three.
Molly Holzschlag
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