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Comment by FirmwareBurner | Hacker News Reader

>simply use the send-keys command to execute the selected code (or line) instantly in pane 1.

Sorry, I don't get it. How can you only run selected code or lines individually without the full context of the program/project that code is part of?

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Here is a super basic example of running rails code: https://cln.sh/xXNlf51m

Now imagine instead of a empty rails shell, I had my server running there and I can set breakpoints. Or why not both a shell and a server?

Stealing this. I'm using send-keys to run specific test examples under my cursor (sends test_command current_file_path:current_line_num)

How is that done?

I'm using this to send what's copied into the clipboard to the other target:

    bind r run 'xsel -bo | tmux load-buffer -; tmux paste-buffer -t .+'

Any chance your configs are on a repo somewhere?! For rails vim and for this tonic setup (if there’s even configs needed for that)

This style of doing things is very common in languages with a (good) REPL, think clojure or ipython. You keep sending snippets and iterating on them until they work as intended. For that, you don't need the full context of your program.

Not a LISPer but apparently in that land you could actually have the program running and a REPL attached to it, in which case, you actually do have all the program at your disposal.

The only nice REPL I have experience with is ipython. And even a few years ago, just turning on autoreload allowed me to do that without selecting anything and copying / pasting, just edit the function in the editor and run it again.

IIRC the docs said there were some edge cases, but I never ran into those.

Why do people keep repeating it... Python doesn't have a REPL. It has an interactive shell. Read-eval-print-loop relies on being able to feed what you print back to the read function. Interactive shell doesn't need the ability to print code: it prints whatever information a function wants to print (often times nothing).

In Python sometimes you can feed back the results of a function into some other function (when you are in the interactive shell), but usually they are nothing like Python code...

I'd imagine he's talking about language with REPL

Think of a REPL or shell (which I guess is a REPL…). Same thing you might do in a Jupyter NB.

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