Today I released new VSCode extension Ruby's rstfilter extension.

This extension provides new Ruby development experience:

• You can see the execution results line by line on the editor without launching a ruby command manually. You only need to start rstfilter command by Ctrl+Alt+S, and see the results of each lines and outputs on the bottom.

• You can see the expression results by hovering the mouse pointer on the expression.

You don't need to write p/pp methods.
You don't need to use irb/pry REPL tools.
You only need to save the file and see the results immediately.

I hope it is useful for:

• Ruby newbie who want to check the results frequently.
• Test developers
• Prototyping developers for apps/libs

For the libraries, the following traditional idiom can be used.

class XXX
   ...
end

if $0 == __FILE__
  # Try with XXX.
  # This test code will be ignored when the file is required.
end

Enjoy your Ruby programming!

Similar projects:

• xmpfilter in rcodetools
• JoshCheek/seeing_is_believing: Displays the results of every line of code in your file
• Quokka - JavaScript and TypeScript playground in your editor
• Duroktar/Wolf: Wolf is a VsCode extension that enables live inspection of Python code in the editor.

Update: v0.0.2 changes the interface. Save doesn't kick the rstfilter but you need to run rstfilter explicitly by Ctrl+Alt+S. Please add Alt to your Ctrl-S saving :)