On: Ask HN: What do you code when learning a new language/framework?

[rauhl]

This comment from a few days suggests implementing ed: https://news.ycombinator.com/item?id=32015912

That strikes me as an excellent idea: it’s a pretty small tool, but it is useful and has just enough complexity to test the language and its standard library. Note, however, that I have not done so myself!