New PDF release: Groovy Recipes: Greasing the Wheels of Java

By Scott Davis

ISBN-10: 0978739299

ISBN-13: 9780978739294

Even if you are new to Groovy or you are an skilled Groovy programmer, Groovy Recipes, is a must-have reference e-book. Groovy Recipes, is sweet at giving a simple clarification on Groovy middle techniques. yet, its genuine energy is in supplying a plethora of examples, that preserve you coming again to this ebook, many times, to benefit the easy beauty of writing Groovy code. whether you are an skilled Java or Groovy programmer, you will need this booklet on your programming software field. I usually reference Chapters 6,7 and eight, "File Tricks," "Parsing XML" and "Writing XML," respectively. The final chapters of the publication, which disguise Grails, are okay, if you'd like a normal realizing of what Grails is and the way to take advantage of it. even if, if Grails is your better curiosity, there are greater books that you will need to have in your shelf to reference (e.g. Groovy and Grails Recipes and The Definitive consultant to Grails).Bottom line, if Groovy is your basic programming language, this is often a good ebook to have on your arsenal.

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No matter if you are new to Groovy or you are an skilled Groovy programmer, Groovy Recipes, is a must-have reference booklet. Groovy Recipes, is nice at giving a easy rationalization on Groovy center ideas. yet, its genuine energy is in delivering a plethora of examples, that continue you coming again to this publication, many times, to profit the straightforward attractiveness of writing Groovy code.

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Extra resources for Groovy Recipes: Greasing the Wheels of Java

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You’re catching an exception because you want to, not because the compiler wants you to do so. each{ println d++ } ===> Sat Sep 01 13:14:20 MDT 2007 Sun Sep 02 13:14:20 MDT 2007 Mon Sep 03 13:14:20 MDT 2007 Operator overloading is alive and well in Groovy after a long absence from the Java language. As you can see in this example, the ++ operator calls the next() method under the covers. compareTo(b) This syntactic sugar shows up throughout the GDK5 (Groovy enhancements to the JDK). List. add("foo")) or in the new Groovy way (list << "foo").

Of course, you can add these methods to your own classes as well. leftShift(item) becomes order << item in Groovy. DATE, 7) ever did. 5. groovy:2) //notice that we can call size() //without throwing a NullPointerException //thanks to the safe dereferencing ? size() ===> null Null references can appear unexpectedly. doSomething(); } This is tedious (and verbose) if receiving a null reference isn’t as catastrophic as the compiler would like you to believe. Groovy offers a shortcut if you’d like to ignore the NullPointerException and proceed silently.

Next, I can wrap those results in HTML fragments using the MarkupBuilder named html that is available to every Groovlet. ) Here is what the resulting HTML looks like... 4, on the next page, you can see what it looks like in the browser. Groovlets aren’t meant to be a replacement for a full-feature web framework. They are simply scripts that you can run on a web server as easily as you could from the command line. For an example of using Groovy within a web framework, see the chapters on Grails and Gorm.

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Groovy Recipes: Greasing the Wheels of Java by Scott Davis

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