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Gradle Goodness: Getting More Dependency Insight


In most of our projects we have dependencies on other code, like libraries or other projects. Gradle has a nice DSL to define dependencies. Dependencies are grouped in dependency configurations. These configuration can be created by ourselves or added via a plugin. Once we have defined our dependencies we get a nice overview of all dependencies in our project with ...

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JavaFX Tip 13: Study Modena CSS File


This is the easiest and shortest tip so far. If you want to do any of the following things: learn how to use CSS make your custom controls look like the standard controls reuse an SVG path graphic used by a standard control (e.g. scrollbar arrows) figure out how to navigate the structure of the standard controls determine the color used ...

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JUnit in a Nutshell: Test Structure


Despite the existence of books and articles about JUnit testing, I still meet quite often programmers, who at most have a vague understanding of the tool and its proper usage. Hence I had the idea to write a multi-part tutorial, that explains the essentials from my point of view. Maybe the hands-on approach taken in this mini-series might be appropriate ...

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All You Ever Need to Know About Recursive SQL


Oracle SYNONYMs are a great feature. You can implement all sorts of backwards-compatibility tweaks simply by creating SYNONYMs in your database. Consider the following schema:                 CREATE TABLE my_table (col NUMBER(7)); CREATE SYNONYM my_table_old FOR my_table; CREATE SYNONYM my_table_bak FOR my_table_old; Now you can query your same old table through three different names, ...

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Validation groups in Spring MVC


Validation constraints in Bean Validation may be added to one or more groups via groups attribute. This allows you to restrict the set of constraints applied during validation. It can be handy in cases where some groups should be validated before others like e.g. in wizards. As of Spring MVC 3.1, automatic validation utilizing validation groups is possible with org.springframework.validation.annotation.Validated ...

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The “Free”, “Standard”, “Open” Software Heresy


There are those people that have a strong, dogmatic belief in what they call “Free” or “Standard” or “Open” software. One of those individuals is Jimmie (let’s call him Jimmie in this article) who has responded to an article about Java persistence by Marco Behler on TheServerSide. Let me cite Jimmie’s response here:           JPA is ...

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From Personas to User Stories


Summary User stories are a powerful technique to capture the product functionality from the perspective of a user or customer. But how do we discover the right stories? When should they be written and how detailed should they be? Read this post to find out my answers to these questions.           1. Start with Personas The ...

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People Are Not Resources


My manager reviewed the org chart along with the budget. “I need to cut the budget. Which resources can we cut?” “Well, I don’t think we can cut software licenses,” I was reviewing my copy of the budget. “I don’t understand this overhead item here,” I pointed to a particular line item. “No,” he said. “I’m talking about people. Which ...

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Java yield-like using Stream API


Several programming languages, such as Ruby or Python to name a few, provides the yield command. Yield provides an effective way, in terms of memory consumption, to create series of values, by generating such values on demand. More information on Python Yield. Let’s consider a class or method requiring a huge amount of secure random integers. The classical approach would ...

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