[petepete]

In IRB I use flyrb[1], which gives me methods called vi, emacs and mate, that give me this functionality.

Incidentally, because I want syntax-highlighting for ruby, I have this in my ~/.irbrc

  def vim
     edit_interactively("vim -c 'set ft=ruby'")
  end

[1] - https://github.com/jtrupiano/flyrb

[banister]

Pry has this functionality built-in but souped-up on a diet of crack: https://github.com/pry/pry/wiki/Editor-integration

;)

[petepete]

Ok. I've switched, was surprisingly easy to integrate with Rails too. Excellent stuff - thanks!