functional

Functional programming techniques and idioms in Groovy.

Groovy Curry and Partial Application – Complete Guide with 10 Examples

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Learn Groovy curry, rcurry, ncurry, and partial application with 10+ tested examples. Build reusable closures, loggers, validators, and pipelines on Groovy 5.x. “Currying is the art of asking for less — turning a function that needs three ingredients into one that already has two.” Haskell Curry, Mathematician Last Updated: March 2026 | Tested on: Groovy 5.x, Java 17+ | Difficulty: Intermediate to Advanced | Reading Time: 16 minutes Groovy curry lets you take a closure with multiple parameters and pre-fill ... Read More

Groovy Higher-Order Functions – collect, inject, groupBy with 10 Examples

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Learn Groovy higher-order functions. Groovy collect, inject, groupBy, collectEntries, and collectMany. 10+ tested examples with output on Groovy 5.x. “Give me a collection and a closure, and I will give you back a transformed world.” Abelson & Sussman, Structure and Interpretation of Computer Programs Last Updated: March 2026 | Tested on: Groovy 5.x, Java 17+ | Difficulty: Intermediate | Reading Time: 17 minutes The each loop is just the beginning – groovy collect, inject, groupBy, and their relatives form a ... Read More

15 Essential Groovy Closure Examples – The Complete Guide

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Groovy closures are one of the language’s most useful features. See 15 practical examples covering syntax, parameters, delegate, composition, and real-world patterns. Tested on Groovy 5.x. “Closures are the Swiss Army knife of Groovy. Once you understand them, every other feature clicks into place.” Venkat Subramaniam, Programming Groovy 2 Last Updated: March 2026 | Tested on: Groovy 5.x, Java 17+ | Difficulty: Intermediate | Reading Time: 22 minutes If there’s one feature that defines Groovy’s personality, it’s closures. They show ... Read More