One of the tools I wish I’d known about sooner is vim-repl. It’s a vim plugin that opens an interactive REPL, configurable based on source file type (.py, .hs, .scala, …)
A REPL, or read-eval-print-loop, lets you input, evaluate, and output expressions without having to (for example) compile an entire program.
I used to run this workflow using SLIME and tmux. Before that, if I wanted a development environment with a tight feedback loop between writing & evaluating code, I defaulted to a Jupyter notebook — which, for this purpose, is probably both the wrong tool to use and often (for me) unsustainable.
I can launch this environment quickly thanks to some keybindings: ,r to open the REPL, and ,w to send code over. Here’s vim-repl in action:
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