Ruby下解决oci8安装错误的问题
Prepare
1. Download 'OCI 1.x.x.rb' (it's VERY important - execution MUST be *.rb)
2. Download 'oci8lib.so'
Install
1. Copy 'OCI8.rb' to .../ruby/lib/ruby/site_ruby/1.8/DBD/OCI8
2. Copy 'oci8.rb' to .../ruby/lib/ruby/site_ruby/1.8
3. Copy 'oci8lib.so' to .../ruby/lib/ruby/site_ruby/1.8/i386-msvcrt
相关文档:
class Point
@x = 1
@y = 2
def initialize(x,y)
@x,@y = x,y
end
end
代码中的@x,@y为实例变量,实例变量只对self的环境起作用,因此initialize外面的@x=1,@y=2只对类本身起作用,而方法内部,的@x,@y是对对象的实例起作用的。
class Point
include Enumerable
def initialize(x ......
安装环境:
OS:Windows XP
Ruby: Ruby1.9.1
Mysql: Mysql5.1.46 (username/password: root/root port:3306)
Ruby-Mysql Driver: mysql-2.8.1-x86-mswin32.gem
(注:用2.7.3版本的驱动在测试时会出现 require"mysql",找不到指定模块 错误)
IDE:RubyMine2.0.1
安装Ruby,RubyMine,Mysql的事项在这里就不多 ......
开发环境:
Ruby:1.9.1
Rails:2.3.5
Rake:0.8.7
Rack:1.0.1
Mysql:5.0.9
Ruby-mysql:mysql-2.8.1-x86-mswin
IDE:RubyMine2.0.1
数据库准备:
database:dbdevelopment
user:crystal
password:crystal
一、创建Ruby项目RorTest
二、修改database.yml
这里只启用development环境数据库,修改配置文件如下:
dev ......
使用 will_paginate 进行分页和简单查询
在命令行下使用 gem install will_paginate 命令,出现下面结果安装成功
打开 books_controller.rb (你自己的控制器)
注释掉查找全部的方法,使用下面的方法,已经集成根据title进行查询
Ruby代码
#@books = Book.all
@books = Book.pagina ......
http://www.robertsosinski.com/2008/12/21/understanding-ruby-blocks-procs-and-lambdas/
Understanding Ruby Blocks, Procs and Lambdas
Blocks, Procs and lambdas (referred to as closures
in Computer Science) are one of the most powerful aspects of Ruby, and
also one of the most misunderstood. This ......