RacheKs的博客

require 'time'class Book attr_accessor :title, :describe, :book_type, :price, :published_at # 1. 定义一个名为MY_BOOK的常量，该常量是一个数组，内部包含三个hash MY_BOOK = Array[ { :title => "台湾自助游参考手册", :describe => :"从此告别跟团的强制购物", :book_type => "1", :price =&

修改Gemfilesource ‘https://ruby.taobao.org’

1. Print和puts的区别puts输出内容独立成行、自动换行，而print会把输出的内容打印在同一行。2. 变量和常量character_name = "Kevin" #variable name变量 character_age = "21" course=2#const常量 puts ("name:" +character_name) puts (character_age+" years old") character_name="roger" puts ("hello "