Leporello.js · Interactive functional programming IDE for JavaScript Your code is executed instantly as you type, with the results displayed next to it. No need to set breakpoints for debugging. Just move the cursor to any line and see what’s happening. Reminds me of some of the concepts from Inventing on Principle by Bret Victor.
Bret Victor – Inventing on Principle (by CUSEC ) Their principles Elizabeth Cady Stanton — “Women should vote” Larry Tesler — “No person should be trapped in a mode” Doug Engelbart — “Enable mankind to solve solve the world’s urgent problems” (a vision of “knowledge workers” using complex powerful information tools to harness our collective intelligence) Alan Kay — “Amplify human reach and bring new ways of thinking into a faltering civilisation that desperately need it”...
Creators need an immediate connection with what they’re making Bret Victor ’s guiding principle (via his talk Inventing on Principle )