Search for Ruby's methods by ag and display the methods by helm.
This package is requirements ag(the silver searcher), helm.el, helm-ag-r.el and ri.
Make sure whether you can use ag and ri command.
For package.el You need register melpa repository if you didn't register it yet.
(push '("melpa" . "http://melpa.milkbox.net/packages/") package-archives)
(package-initialize)
Then you can install helm-rb by M-x package-install RET helm-rb. helm.el and helm-ag-r.el are installed automatically, so you don't care about those packages.
For el-get Firstly you need to install helm and helm-ag-r package to resolve dependencies.
And then set below configuration to your .emacs
(push '(:name helm-rb
:type git
:url "https://github.com/yuutayamada/helm-rb.git"
:depends (helm helm-ag-r)
:load-path "./")
el-get-sources)
Then you can install this package by M-x el-get-install helm-rb.
Set your below configuration to your .emacs etc..
(add-to-list 'load-path "path/to/this-package")
(require 'helm-rb)
and then push M-x helm-rb