null handling

Handling null values safely in Groovy programs.

Groovy Elvis Operator (?:) – Default Values Made Easy with 11 Examples

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Groovy Elvis operator (?:) for concise default values. 10+ examples covering Elvis assignment, null handling, and real-world patterns. Tested on Groovy 5.x. “A little less conversation, a little more action.” — The Elvis operator takes that motto seriously: less boilerplate, more results. Dierk König, Groovy in Action Last Updated: March 2026 | Tested on: Groovy 5.x, Java 17+ | Difficulty: Beginner to Intermediate | Reading Time: 15 minutes If you have ever written a long chain of if (x != ... Read More

Groovy Safe Navigation Operator (?.) – Avoid NullPointerException with 11 Examples

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Groovy safe navigation operator (?.) to avoid NullPointerException. 10+ examples covering chaining, collections, and real-world patterns. Tested on Groovy 5.x. “NullPointerException is the billion-dollar mistake of software engineering. The safe navigation operator is Groovy’s way of saying: never again.” Tony Hoare, Inventor of Null References Last Updated: March 2026 | Tested on: Groovy 5.x, Java 17+ | Difficulty: Beginner to Intermediate | Reading Time: 15 minutes If you have spent any time writing Java, you know the pain of NullPointerException. ... Read More