When I watched the video of Bret Victor’s presentation “Inventing on Principle” I was really fascinated about how software development tools could look like - take the time, you will enjoy this presentation:

Bret Victor - Inventing on Principle from CUSEC on Vimeo.

Today Apple presented Swift and the new developer tools they are providing around it. They demonstrated a feature called Playgrounds that looks a lot like Bret showed:

This is really exciting, I am looking forward to experiment with this.