yao

I have installed elixir on my computer. 运行elixir代码出现如下提示： "Code language not supported or defined." What configuration should I do to avoid that？

The extension is `.ex` doesn't work, but the `.exs` works fine. Also I noticed when I just create a temporary without saving it and change the language mode to Elixir,...

> Interested in reading this book but the link to the pdf is no longer valid yeah, what a pity.