liwh

#测试数据库连接状态：
  My_Model.connection.current_database

liwh

sudo port install mongodb
Password:
--->  Computing dependencies for mongodb
--->  Dependencies to be installed: boost boost-jam libpcap pcre scons spidermonkey nspr
--->  Fetching boost-jam
--->  Attempting to fetch boost-jam-3.1.18.tgz from http://cdnetworks-kr-2.dl.sourceforge.net/boost
--->  Verifying checksum(s) for boost-jam
--->  Extracting boost-jam
--->  Applying patches to boost-jam
--->  Configuring boost-jam

liwh

自动补全 : esc
查找项目文件:command+t
查找文件内符号:shift+command+t
跳到某行:command+l
选择:shift+方向键
向后缩进:option+tab
向前缩进:shift+option+tab
reformat 所选:option+command+[
大写所选:control+u
小写所选:control+shift+u

liwh

#1
file= File.new('filename','w')
file.puts 'aa'
file.close

#2
File.open('filename','w') do |file|
  file.puts 'aa'
end

liwh

module A
  A.const_set("NUM",2)
end

A::NUM

liwh

 history | awk {'print $2'} | sort | uniq -c | sort -k1 -rn | head

liweihui@desktop:~$ history | awk {'print $2'} | sort | uniq -c | sort -k1 -rn | head
     85 cd
     77 git
     74 vim
     68 ls
     22 rm
     20 mv
     14 ruby

liwh

sudo kill -9 `ps -A|grep memca|awk '{print $1}'` && memcached -m 20 -d

liwh

由于，觉得用textmate还是不大习惯，所以，还是决定把macvim安装上，首先，在安装之前，我们现查看一下vim包的variants。

   ApplematoMacBook-Pro:~ Apple$ port variants vim

   vim has the variants:

   athena: Build GUI version using Athena widgets


	
conflicts with gtk1 gtk2 motif
	
requires x11

   big: Build big feature set
	
conflicts with small tiny

   cscope: Enable source code browsing with cscope

liwh

# app/models/abstract_server.rb
class AbstractServer < ActiveRecord::Base
  self.abstract_class = true
  
  validates_presence_of :name, :address, :username, :password, :encoding
  
  validates_length_of :name, :maximum => 20, :allow_blank => true
  validates_length_of :address, :maximum => 20, :allow_blank => true
  validates_length_of :username, :password, :maximum => 20, :allow_blank => true
  validates_length_of :encoding, :maximum => 10, :allow_blank => true

liwh

• 首先安装rvm，这个和在linux上安装是一致的，安装完成之后，将 if [[ -s /Users/Apple/.rvm/scripts/rvm ]] ; then source /Users/Apple/.rvm/scripts/rvm ; fi 放在~/.bash_profile中。
• rvm 1.9.2 —default
• 参见前面安装rails 3
• bundle install (在项目目录下执行,注意将Gemfile文件里的rb-inotify这个gem注释调，因为它还不支持os x平台）
• 安装homebrew,具体步骤见:安装homebrew ,homebrew安装东西比macport要快很多。
• sudo brew install ImageMagick
• sudo brew install mongodb (具体步骤见:安装mongodb )