- Using closures to simulate Object-Oriented computing

- A declarative GUI package for Racket

This informal presentation will use Scheme to introduce the concepts of functions, lambdas, lambda evaluations, closures, closure evaluations, simulated-non-inheritance objects and method invocations, and simulated Smalltalk-like message passing between objects.

[1]  Closure (computer programming):    https://en.wikipedia.org/wiki/Closure_(computer_programming)

Several languages (e.g. Python, Javascript, Haskell, Scheme, and others) directly support the concept of closure[1].  Closures can be used among other things to simulate objects and method calls without the need of formal underlying OO infrastructure making for portable OO solutions.

- Using closures to simulate Object-Oriented computing

- A declarative GUI package for Racket