Learn every way to Groovy add to map operations with 10 tested examples. Put, leftShift, plus operator, and more on Groovy 5.x. “A map without entries is like a kitchen without ingredients. Knowing how to fill it efficiently is half the battle.” Kent Beck, Implementation Patterns Last Updated: March 2026 | Tested on: Groovy 5.x, Java 17+ | Difficulty: Beginner to Intermediate | Reading Time: 16 minutes Maps are one of the most-used data structures in Groovy, and knowing how ... Read More