Learning Groovy 3: Java-Based Dynamic Scripting

© Adam L. Davis 2019

Adam L. DavisLearning Groovy 3https://doi.org/10.1007/978-1-4842-5058-7_6

6. Groovy Design Patterns

Adam L. Davis¹ 

(1)

New York, NY, USA

 

Design patterns are a great way to make your code functional, readable, and extensible. There are some patterns that are easier and require less code in Groovy compared to Java.

Strategy Pattern

Imagine you have three different methods for finding totals as follows:

 1   def totalPricesLessThan10(prices) {

 2           int total = 0

 3           for (int price : prices)

 4                   if (price < 10) total += price

 5           total

 6   }

 7    def totalPricesMoreThan10(prices) {

 8               int total = 0

 9               for (int price : prices)

10                       if (price > 10) total ...