http://guides.rubyonrails.org/getting_started.htmlを見ながらRails4でHelloWorldやってみました。

$ rails new blog $ cd blog $ vi Gemfile(追記) gem 'execjs' gem 'therubyracer' $ rails server

```$ rails generate controller welcome index $ vi app/views/welcom/index.html.erb (全部消して、したのを書く)

Hello, Rails!


アプリケーションのホームページにする
config/routes.rbを編集する

Blog::Application.routes.draw do get “welcome/index” # The priority is based upon order of creation:

first created -> highest priority.

# … # You can have the root of your site routed with “root” # root to: “welcome#index” ```

これを

Blog::Application.routes.draw do
get “welcome/index”
# The priority is based upon order of creation:

# first created -> highest priority.
# …
# You can have the root of your site routed with “root”
root to: “welcome#index”  ⬅コメントはずした

これでhttp://localhost:3000/welcome/index これでも、

http://localhost:3000/これでもアクセスできます。