Very late reply, but hey, here's an example of Jeff's programming knowledge: https://observablehq.com/@jperkel/example-executable-observable-notebook https://ob

Very late reply, but hey, here's an example of Jeff's programming knowledge: https://observablehq.com/@jperkel/example-executable-observable-notebook https://observablehq.com/@jperkel/example-executable-observa... I believe he is very familiar with C, R, Python, Julia, and other languages.