CHAPTER 5Closures

You have already seen some examples of closures in previous chapters. The concept of closures is new to most Java developers, and closures might seem a bit foreign when you see them for the first time. By working your way through the examples in this chapter, you will get a much better understanding of closures, how they work, and how to use them efficiently. Closures are important in Groovy; almost any real-life example in Groovy will use closures, and a good understanding of them is essential if you want to get the most out of the language.

5-1. What Is a Closure?

A closure is simply an anonymous block of code. The most important thing you need to know about closures is that they are objects of type groovy.lang.Closure: you ...

Get Groovy and Grails Recipes now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.