⚡️ Lightning Demo

Nextjournal is a hosted notebook platform for literate programming.

Goals:

• better way to present ideas compared to status quo (PDFs)

• run existing code: not learn a new language

• reproducibility: apply immutability to document, data and environment (docker image) to make sure things keep running

🌈 Standard Notebooks features

randn(5)

library(ggplot2)

theme_set(theme_classic())

# Histogram on a Continuous (Numeric) Variable

g <- ggplot(mpg, aes(displ)) + scale_fill_brewer(palette = "Spectral")

g + geom_histogram(aes(fill=class), binwidth = .1, col="black", size=.1) +

  labs(title="Histogram with Auto Binning", 

       subtitle="Engine Displacement across Vehicle Classes")

🗃 Passing Data

Polyglot cells can exchange data by writing to a /results folder.

with open("/results/wave.txt", 'w') as f:

	f.write("Hello Future of Coding 👋")

Then other cells can access it.

ls wave.txt

🥾 Custom Components & API

Work-in-progress: extensibility via in-browser runtimes:

(def turtles (atom []))

^{:nextjournal/viewer :reagent}

#(into [:div] (map (fn [s] [:span {:style {:font-size s}} "🐢"])) @turtles)

(dotimes [_ 10]

  (swap! turtles conj (/ (or (last @turtles) 130) 1.2)))

✨ More

• realtime collaboration

• on demand provisioning with powerful machines + GPUs

• automatic versioning

• remix existing notebooks

🙏 Thank You