Tools to support live coding as in Bret Victor's “Inventing on Principle” talk

Question

I\'ve watched an already well known video where Bret Victor, former Apple UI designer shows amazing demos with immediate updates of running code after changing literally one

Answer 1

Haskell for Mac may have a limited audience since it’s (a) platform-specific — as you may have guessed from the name — and (b) commercial software ($20 at present). But it’s very explicitly based on Brett Victor’s ideas, as discussed in an early blog post.

It certainly deserves to be added to any exhaustive list of programming environments that implement “Learnable Programming”.