Closures: why are they so useful?

Question

As an OO developer, maybe I have difficulty seeing its value. What added value do they give? Do they fit in an OO world?

Answer 1

Here are some interesting articles:

• Crossing borders: Closures - by Bruce Tate, mentions some advantages of closures
• A Definition of Closures - by Neal Gafter (one of the people who invented one of the closures proposals for Java)