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closures

  • Essentially blocks of code that can be assigned to variables, passed as arguments to functions, and executed later
  • They capture and remember the environment in which they were created (including variables), making them very versatile.

Groovy example​

def greeting = { name -> println "Hello, $name!" } // Define a closure

greeting("Alice") // Call the closure
  • Used extensively in:
    • Builders: To construct complex objects (like XML or HTML).
    • Collections: To transform or filter elements.
    • Testing Frameworks: To set up test data and conditions.

References

  • Gemini