I haven't used vim in years but there's a package by Tim Pope: https://github.com/tpope/vim-fireplace https://github.com/tpope/vim-fireplace This is a key piec

I haven't used vim in years but there's a package by Tim Pope: https://github.com/tpope/vim-fireplace https://github.com/tpope/vim-fireplace This is a key piece of the REPL workflow: you rarely type into the REPL, you use commands in your editor to select code and run it in a REPL. The idea is that you eval stuff in the same place you type, and that gets run in the same environment over and over again without having to restart it or redefine the data you're using to iterate your functions.