Ruby for Rails : Rails開發者必備的Ruby學習手冊 –> 大推
Ruby code 怎麼去寫讀local檔和建立新文字檔，修改文字檔:
1. read file
a = File.read(“filename")
2. create file
a = File.new(“filename", “w")
a.close
3. write to file
a = File.new(“filename", “w")
a.puts b
a.close
*** ruby tool 實用工具(大推):
1. ruby -r debug filename (debug)
2. ruby -r profile filename (check utilization)
*** what’s erb 什麼是 .erb
1. 在html檔案裡面，置入Ruby code
2. 將RoR模子->操作->呈現，就是最後一個呈現網頁結果，通常會是或是
3. 執行erb和執行rb不一樣，執行erb要用 “erb filename"
*** 所謂的MVC結構
串起M-V-C，一定是Rails:
/usr/local/rvm/gems/ruby-1.9.2-p180/gems/rails-3.0.1
M的解釋：
Model (ActiveRecord): /usr/local/rvm/gems/ruby-1.9.2-p180/gems/activerecord-2.3.2/
C的解釋：
Control (ActionController): /usr/local/rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.0.1/lib/action_controller
V的解釋：
View (ActionView): /usr/local/rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.0.1/lib/action_view
vlpeng 