Automatic Code Folding/Collapsing in Vim for Ruby

Add this to your .vimrc to enable automatic code folding for Ruby comments: ``` " Enable automatic code folding for Ruby autocmd FileType ruby,eruby \ set foldmethod=expr | \ set foldexpr=getline(v:lnum)=~'^\\s*#' ``` Open and close folds with zo and zc. See **:help folding** for details. [Automatically fold comments in Vim](http://travisjeffery.com/b/2012/01/automatically-fold-comments-in-vim/)