Get Groovy array length using length, size(), and count(). 10 tested examples covering arrays, lists, maps, and strings on Groovy 5.0.6. “Knowing how many elements you have is the first step to doing something useful with them.” Last Updated: July 2026 | Tested on: Groovy 5.0.6, Java 17+ | Difficulty: Beginner | Reading Time: 14 minutes Checking how many elements an array or collection contains is one of the most frequent operations in any Groovy program. Input validation, data iteration, ... Read More

Checking whether a Groovy list contains a value, removing elements without hitting the index-versus-value trap, and stripping duplicates: these three jobs come up in nearly every script. This guide works through all of them with 10 tested examples on Groovy 5.0.6. “The art of programming is the art of organizing complexity – and lists that contain duplicates and stale entries are complexity waiting to bite you.” Last Updated: July 2026 | Tested on: Groovy 5.0.6, Java 17+ | Difficulty: Beginner ... Read More

This guide covers Groovy lists with 15 practical examples. Create, access, sort, filter, and transform lists. Complete tutorial tested on Groovy 5.0.6. “Lists are the bread and butter of any programming language. Master lists, and you’ve mastered data manipulation.” Last Updated: July 2026 | Tested on: Groovy 5.0.6, Java 17+ | Difficulty: Beginner to Intermediate | Reading Time: 20 minutes If you’re working with Groovy, you’re going to work with lists. A lot. Whether it’s processing API responses, transforming database ... Read More