New PDF release: Beginning Groovy, Grails and Griffon

By Vishal Layka, Christopher M. Judd, Joseph Faisal Nusairat, Jim Shingler

Net frameworks are taking part in a huge function within the production of today's so much compelling net purposes, simply because they automate a few of the tedious projects, permitting builders to as a substitute concentrate on offering clients with inventive and strong positive factors. Java builders were relatively lucky during this zone, having been capable of benefit from Grails, an open resource framework that supercharges productiveness whilst development Java–driven sites. Grails is predicated on Groovy, that's a really renowned and becoming dynamic scripting language for Java builders and used to be encouraged through Python, Ruby, and Smalltalk.

Beginning Groovy, Grails and Griffon is the 1st introductory publication at the Groovy language and its basic net framework, Grails. Griffon is additionally coated. whereas Grails is the internet framework for development Groovy internet purposes, Griffon is the deskop framework for construction computing device Groovy purposes. may Groovy be the hot Java? It's mild, speedy and loose (open source).

This e-book will get you begun with Groovy, Grails and Griffon, and culminates within the instance and attainable program of a few real–world initiatives. You stick to besides the advance of every venture, enforcing and working each one software whereas studying new positive aspects alongside the best way.

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Extra resources for Beginning Groovy, Grails and Griffon

Sample text

With Java, you need to define a class and a main method. You also must fully qualify the println method, add parentheses, and terminate it with a semicolon. Then you need all of the closing curly braces. Even if you are a Java fan, you have to admit that the Groovy example is a good bit shorter and easier to read! Furthermore, you don’t need to go through a separate step of compiling Groovy before it is executed. Using Script Functions Like with most scripting languages, you can organize Groovy scripts into blocks of reusable code.

28. 29. 30. 31. 32. 33. name } closure2() u In Listing 2-51, the implicit variables this, owner, and delegate occur inside the outer closure from Line 4 to Line 6, inside the nested closure from Line 9 to Line 11, outside the class (closure2) from Line 27 to Line 29. u The this, owner, and delegate inside the outer closure from Line 4 to Line 6 refer to the class name; for example, Class1. u The this inside the nested closure from Line 9 to Line 11 refers to the class name (for example, Class1), and the owner and delegate refer to the closure class of the outer closure; for example, Class1$_closure1.

In this case, there is no result, so null is returned. The Groovy Shell contains a built-in help facility that you can use to learn more about the shell. To access it, type help at the prompt. Figure 2-2 shows the help listing. 18 CHAPTER 2 N GROOVY BASICS Figure 2-2. Groovy Shell help information Groovy Console The Groovy Console, shown in Figure 2-3, is a graphical version of the Groovy Shell. It is written using SwingBuilder, a Groovy module that makes building a Swing user interface easier.

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