I started to switch the ruby development environment to Emacs.

After reading this demonstration, you can't turn it around. A basic IDE is built up. Directory tree management integrated with version control.CodeAutomatic completion. If multiple options are selected, you can enter a class name to differentiate them. Quickly search for buffers and files. Closely integrated with Ri. The block is automatically completed, including def end and while end. Integration with IRB. What is better than IRB is the so-called annotated Ruby buffer, which allows us to view the results of each row immediately when editing Ruby code. Intelligent spelling check. ERB syntax recognition. And so on... We need to reduce the size of vim. In the form of warnings, I had to discard the title of Emacs semi-illiterate. So today, I went to the library to lend O 'Reilly's learning GNU Emacs, the third edition. The book turned over. Amen...