LightTable 0.7.2 recently released, is a unique kind of integrated development environment (IDE) – a reactive work surface for the creation and exploration of our programs. It allows you to have a real-time debugging of your code while typing. This means you get a real-time feedback allowing instant execution, debugging and access to documentation. The instant feedback provides an unusual execution environment intended to help developing abstractions. LightTable 0.7.2 update since v0.