最终环境:ubuntu10.10 + ruby 1.8.7 + ruby 1.9.2 + rails 2.3.5 + rails 3.0.3
新的项目，使用最新的ruby1.9.2 + rails3.X开发,所以 环境必须重新搭建 ，但是又要能使之前的rails2.X项目跑起来，所以，就用到了rvm来控制，rvm确实不错，一直用部署的capistrano差不多，很方便，rvm的原理是动态的改变系统的path，即ruby的bin目录，来调用不同的ruby版本的，都有自己独立的文件夹，这样管理rails的那些gem也就独立开来了，核心是一个script，有兴趣的可以看下，$HOME/.rvm/scripts/rvm , 这个shell脚本,下面介绍安装过程：
需要用到 git 和 curl
sudo apt-get install git sudo apt-get install curl
注意首先把原来的ruby bin目录从PATH中去掉
安装 rvm
cd ~
bash < <( curl http://rvm.beginrescueend.com/releases/rvm-install-head )
cd .rvm/src/rvm
./install查看 rvm 安装目录
wxianfeng@ubuntu:~/.rvm/gemsets/ruby$ echo $rvm_path /home/wxianfeng/.rvm
~/.bashrc中添加下面代码(PATH之用) 很重要
if [[ -s "$HOME/.rvm/scripts/rvm" ]] ; then source "$HOME/.rvm/scripts/rvm" ; fi
安装 ruby 1.9.2
>rvm notes sudo apt-get install build-essential bison openssl libreadline5 libreadline5-dev curl git zlib1g zlib1g-dev libssl-dev libyaml-dev libsqlite3-0 libsqlite3-dev sqlite3 libxml2-dev autoconf rvm install 1.9.2
查看:
wxianfeng@ubuntu:~$ rvm list rvm rubies ruby-1.9.2-p0 [ i386 ]
设置默认的 ruby 版本(必须设置)
>rvm --default ruby-1.9.2-p0
可以看到 相关信息
wxianfeng@ubuntu:~$ rvm info ruby-1.9.2-p0: system: uname: "Linux ubuntu 2.6.35-22-generic #33-Ubuntu SMP Sun Sep 19 20:34:50 UTC 2010 i686 GNU/Linux" bash: "/bin/bash => GNU bash, version 4.1.5(1)-release (i686-pc-linux-gnu)" zsh: " => not installed" rvm: version: "rvm 1.1.0 by Wayne E. Seguin (wayneeseguin@gmail.com) [http://rvm.beginrescueend.com/]" ruby: interpreter: "ruby" version: "1.9.2p0" date: "2010-08-18" platform: "i686-linux" patchlevel: "2010-08-18 revision 29036" full_version: "ruby 1.9.2p0 (2010-08-18 revision 29036) [i686-linux]" homes: gem: "/home/wxianfeng/.rvm/gems/ruby-1.9.2-p0" ruby: "/home/wxianfeng/.rvm/rubies/ruby-1.9.2-p0" binaries: ruby: "/home/wxianfeng/.rvm/rubies/ruby-1.9.2-p0/bin/ruby" irb: "/home/wxianfeng/.rvm/rubies/ruby-1.9.2-p0/bin/irb" gem: "/home/wxianfeng/.rvm/rubies/ruby-1.9.2-p0/bin/gem" rake: "/home/wxianfeng/.rvm/gems/ruby-1.9.2-p0/bin/rake" environment: PATH: "/home/wxianfeng/.rvm/gems/ruby-1.9.2-p0/bin:/home/wxianfeng/.rvm/gems/ruby-1.9.2-p0@global/bin:/home/wxianfeng/.rvm/rubies/ruby-1.9.2-p0/bin:/home/wxianfeng/.rvm/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/system/mysql/bin:/usr/local/system/jdk1.6.0_22/bin" GEM_HOME: "/home/wxianfeng/.rvm/gems/ruby-1.9.2-p0" GEM_PATH: "/home/wxianfeng/.rvm/gems/ruby-1.9.2-p0:/home/wxianfeng/.rvm/gems/ruby-1.9.2-p0@global" MY_RUBY_HOME: "/home/wxianfeng/.rvm/rubies/ruby-1.9.2-p0" IRBRC: "/home/wxianfeng/.rvm/rubies/ruby-1.9.2-p0/.irbrc" RUBYOPT: "" gemset: ""
这时发现你的PATH已经变了
wxianfeng@ubuntu:~$ echo $PATH /home/wxianfeng/.rvm/gems/ruby-1.9.2-p0/bin:/home/wxianfeng/.rvm/gems/ruby-1.9.2-p0@global/bin:/home/wxianfeng/.rvm/rubies/ruby-1.9.2-p0/bin:/home/wxianfeng/.rvm/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/system/mysql/bin:/usr/local/system/jdk1.6.0_22/bin
wxianfeng@ubuntu:~$ ruby -v ruby 1.9.2p0 (2010-08-18 revision 29036) [i686-linux]
ruby 1.9.2 安装成功
安装rails
wxianfeng@ubuntu:~$ gem install rails --pre --no-ri --no-rdoc /home/wxianfeng/.rvm/rubies/ruby-1.9.2-p0/bin/gem:4: warning: Insecure world writable dir /usr/local/system in PATH, mode 040777 Successfully installed activesupport-3.0.0.rc2 Successfully installed builder-2.1.2 Successfully installed i18n-0.4.2 Successfully installed activemodel-3.0.0.rc2 Successfully installed rack-1.2.1 Successfully installed rack-test-0.5.6 Successfully installed rack-mount-0.6.13 Successfully installed tzinfo-0.3.23 Successfully installed abstract-1.0.0 Successfully installed erubis-2.6.6 Successfully installed actionpack-3.0.0.rc2 Successfully installed arel-1.0.0.rc1 Successfully installed activerecord-3.0.0.rc2 Successfully installed activeresource-3.0.0.rc2 Successfully installed mime-types-1.16 Successfully installed polyglot-0.3.1 Successfully installed treetop-1.4.9 Successfully installed mail-2.2.10 Successfully installed actionmailer-3.0.0.rc2 Successfully installed thor-0.14.6 Successfully installed railties-3.0.0.rc2 Successfully installed bundler-1.0.0.rc.6 Successfully installed rails-3.0.0.rc2 23 gems installed
有提示我path中有777权限目录，看着不顺眼，解决掉:
sudo chmod go-w /usr/local/system发现安装上的是 3.0.0.rc2 不是我想要的，目前最新版是 3.0.3
咋办,用shell脚本全部remove掉
shell:
#!/bin/bash for i in `gem list` do gem uninstall $i done
最后发现rake无法uninstall掉,好那就进入目录把rake delete掉
wxianfeng@ubuntu:~$ gem list -d rake /home/wxianfeng/.rvm/rubies/ruby-1.9.2-p0/bin/gem:4: warning: Insecure world writable dir /usr/local/system in PATH, mode 040777 *** LOCAL GEMS *** rake (0.8.7) Author: Jim Weirich Rubyforge: http://rubyforge.org/projects/rake Homepage: http://rake.rubyforge.org Installed at: /home/wxianfeng/.rvm/gems/ruby-1.9.2-p0@global Ruby based make-like utility. >cd /home/wxianfeng/.rvm/gems/ruby-1.9.2-p0@global wxianfeng@ubuntu:~/.rvm/gems/ruby-1.9.2-p0@global$ ll total 28 drwxr-xr-x 7 wxianfeng wxianfeng 4096 2010-11-23 14:14 ./ drwxr-xr-x 5 wxianfeng wxianfeng 4096 2010-11-23 14:14 ../ drwxr-xr-x 2 wxianfeng wxianfeng 4096 2010-11-23 15:21 bin/ drwxr-xr-x 2 wxianfeng wxianfeng 4096 2010-11-23 15:22 cache/ drwxr-xr-x 2 wxianfeng wxianfeng 4096 2010-11-23 15:22 doc/ drwxr-xr-x 2 wxianfeng wxianfeng 4096 2010-11-23 15:20 gems/ drwxr-xr-x 2 wxianfeng wxianfeng 4096 2010-11-23 15:21 specifications/
把bin cache doc gems specifications 下和rake相关的信息全部remove掉
重新安装成功 rails 3.0.3
wxianfeng@ubuntu:~$ gem install rails -v=3.0.3 --no-ri --no-rdoc /home/wxianfeng/.rvm/rubies/ruby-1.9.2-p0/bin/gem:4: warning: Insecure world writable dir /usr/local/system in PATH, mode 040777 Successfully installed activesupport-3.0.3 Successfully installed builder-2.1.2 Successfully installed i18n-0.4.2 Successfully installed activemodel-3.0.3 Successfully installed rack-1.2.1 Successfully installed rack-test-0.5.6 Successfully installed rack-mount-0.6.13 Successfully installed tzinfo-0.3.23 Successfully installed abstract-1.0.0 Successfully installed erubis-2.6.6 Successfully installed actionpack-3.0.3 Successfully installed arel-2.0.4 Successfully installed activerecord-3.0.3 Successfully installed activeresource-3.0.3 Successfully installed mime-types-1.16 Successfully installed polyglot-0.3.1 Successfully installed treetop-1.4.9 Successfully installed mail-2.2.10 Successfully installed actionmailer-3.0.3 Successfully installed rake-0.8.7 Successfully installed thor-0.14.6 Successfully installed railties-3.0.3 Successfully installed bundler-1.0.7 Successfully installed rails-3.0.3 24 gems installed
wxianfeng@ubuntu:~$ rails -v Rails 3.0.3
安装 ruby 1.8.7
>rvm install 1.8.7
切换到 1.8.7
wxianfeng@ubuntu:~/.rvm/gemsets/ruby$ rvm 1.8.7
wxianfeng@ubuntu:~/.rvm/gemsets/ruby$ gem list /home/wxianfeng/.rvm/rubies/ruby-1.8.7-p302/bin/gem:4: warning: Insecure world writable dir /usr/local/system in PATH, mode 040777 *** LOCAL GEMS *** rake (0.8.7)
悲剧的发现 其实 默认rake是安装上的，之前我还把它 给干掉 重新安装了
安装 rails 2.3.5
>gem install rails -v=2.3.5 --no-ri --no-rdoc
以后切换的话 就用 rvm —default 1.8.7 或者 rvm —default 1.9.2 切换默认的ruby版本,可以使用 rvm 1.8.7 切换当前终端版本到1.8.7 , 也就是可以同时开ruby 1.8.7 , ruby 1.9.2 的项目了
安装之前ruby 1.8.7 + rails 2.3.5 项目的 所有gems (注意把ruby版本切到1.8.7), 如果已经安装了,就不安装:
shell:
#!/bin/bash # 安装所有的gems,如果已经安装了就不安装 cd /usr/local/system/ruby/lib/ruby/gems/1.8/cache for i in `ls`;do gem=`echo $i | awk -F'-' '{print $1}'` version=`echo $i | grep -o "\-[0-9].*" | sed 's/^-//;s/.gem//'` is_gem_exist=`gem list $gem -v=$version` if [ -z "$is_gem_exist" ]; then # 注意[] 内部两边留空格 `gem install $i` else echo "$i have installed" fi done
这样，之前ruby 1.8.7+rails2.3.4的项目 和现在的 ruby 1.9.2 + rails 3.0.3 都兼容了…oh…YEAR
问题: netbeans 配置使用 ruby 1.8.7 + rails 2.3.5 OR ruby 1.9.2 + rails 3.0.3 ?
更改netbeans 的ruby path ,选择 autodetect 会把ruby的bin全部找出来，但是注意gem path 有可能错误,通过 rvm info 看下 gem 的位置,然后手动更改即可~!
SEE:
http://thoughtrails.com/episodes/1-installing-rails-3-on-ubuntu-10-04-lucid-lynx-with-rvm
http://rvm.beginrescueend.com/rvm/install/
最终环境 : ubuntu 10.10 + ruby 1.8.7 + rails 2.3.5 + mysql 5.1
换了新工作，重新搭建开发环境，鉴于之前mysql遇到问题，总是不好解决，束手无策，甚至找不到 mysql 安装哪去了，所以这次主要想编译安装mysql，这样有利于了解mysql
1,下载ruby1.8.7 (http://www.ruby-lang.org/en/news/2010/08/16/ruby-1-8-7-p302-is-released/)
wget ftp://ftp.ruby-lang.org/pub/ruby/1.8/ruby-1.8.7-p302.tar.bz2
2,安装依赖的库
sudo apt-get install build-essential sudo apt-get install autoconf sudo apt-get install zlib1g-dev sudo apt-get install openssl libssl-dev
3,编译安装ruby
tar -jxvf ruby-1.8.7-p302.tar.bz2 cd ruby-1.8.7-p302/ autoconf ./configure --prefix=/usr/local/system/ruby make sudo make install
4,ruby 加到PATH 中
vim ~/.bashrc export PATH="$PATH:/usr/local/system/ruby/bin"
5,ruby -v
安装rubygems（http://rubyforge.org/frs/?group_id=126&release_id=43601）
1，下载
wget http://rubyforge.org/frs/download.php/70696/rubygems-1.3.7.tgz
2,解压
tar -zvxf rubygems-1.3.7.tgz
3,安装
cd rubygems-1.3.7/ wxianfeng@ubuntu:~/Desktop/rubygems-1.3.7$ ruby setup.rb ERROR: While executing gem ... (Errno::EACCES) Permission denied - /usr/local/system/ruby/lib/ruby/site_ruby/1.8/rubygems wxianfeng@ubuntu:~/Desktop/rubygems-1.3.7$ sudo ruby setup.rb [sudo] password for wxianfeng: sudo: ruby: command not found 改变权限 cd /usr/local sudo chmod -R 777 system/ 再次安装就ok了，不然你以后还会遇到这个问题
4,gem -v
安装rails 2.3.5
>gem install rails -v 2.3.5 --no-ri --no-rdoc
编译安装 mysql
1,下载并且编译安装
download (http://downloads.mysql.com/archives.php?p=mysql-5.1) 从archives 找到 ,注意下载的是source包
sudo apt-get install g++ libncurses5-dev # 安装依赖的库 sudo groupadd mysql # 建立mysql用户组 sudo useradd -g mysql mysql # 添加用户mysql tar -zvxf mysql-5.1.51.tar.gz cd mysql-5.1.51/ ./configure --prefix=/usr/local/system/mysql --with-charset=utf8 --with-collation=utf8_general_ci --with-extra-charsets=latin1(all) --with-plugins=innobase(all) # config 很重要,括号里是或者 make sudo make install sudo cp support-files/my-medium.cnf /etc/my.cnf # 配置文件
注意mysql sock文件安默认装在tmp路径下 /tmp/mysql.sock,编译的时候 —with-plugins=all 建议加上 不然你会发现编译后不支持innodb引擎，那就麻烦了!
2, 初始化数据库并修改目录权限
cd /usr/local/system/mysql sudo bin/mysql_install_db --user=mysql sudo chown -R root . sudo chown -R mysql /usr/local/system/mysql/var sudo chgrp -R mysql .
3,启动mysql
bin/mysqld_safe --user=mysql & netstat -antup | grep 3306 sudo cp /usr/local/system/mysql/share/mysql/mysql.server /etc/init.d/mysql sudo killall mysqld # kill 刚刚启动的mysql sudo /etc/init.d/mysql start|stop|restart|status # 重启mysql
4,添加PATH
>vim ~/.bashrc export PATH="$PATH:/usr/local/system/mysql/bin" wxianfeng@ubuntu:/usr/local/system/mysql/bin$ mysql --version mysql Ver 14.14 Distrib 5.1.51, for pc-linux-gnu (i686) using EditLine wrapper
5, 修改mysql root 密码
>sudo /etc/init.d/mysql start --skip-grant-tables >mysql -uroot -p mysql >update user set password=passsword('root') where user='root'; 重启mysql 就ok了 root 账户的密码为root
6,怎么判断我的mysql是编译安装的
wxianfeng@ubuntu:~$ mysql --version mysql Ver 14.14 Distrib 5.1.51, for pc-linux-gnu (i686) using EditLine wrapper
如果你是apt-get 安装的话就显示 for ubuntu-linux-gnu
yum 安装的话就显示 for redhat-linux-gnu 了
遇到的问题:
1,
>mysql -uroot -p
Can’t connect to local MySQL server through socket ‘/var/run/mysqld/mysqld.sock’ (2)
>mysql -uroot -p --socket=/tmp/mysql.sock 可以启动,所以是sock问题 后来发现 my.cnf 有两个配置文件，/etc/mysql/my.cnf 多了一个这个,里面sock路径指定不一样所致,rename 掉 >mv /etc/mysql/my.cnf /etc/mysql/my_cnf.bak
2,
Starting MySQL. * Manager of pid-file quit without updating file. 错误
wxianfeng@ubuntu:/usr/local/system/shell$ /etc/init.d/mysql start Starting MySQL. * Manager of pid-file quit without updating file.
需要加sudo
3,查看mysql data目录
root@ubuntu:/usr/local/system/mysql/var# ps auxf | grep mysql root 25756 0.0 0.0 4012 764 pts/3 S+ 15:32 0:00 | \_ grep --color=auto mysql root 25000 0.0 0.0 4904 1400 ? S 14:22 0:00 /bin/sh /usr/local/system/mysql/bin/mysqld_safe --datadir=/usr/local/system/mysql/var --pid-file=/usr/local/system/mysql/var/ubuntu.pid mysql 25106 0.0 0.8 119652 16568 ? Sl 14:22 0:00 \_ /usr/local/system/mysql/libexec/mysqld --basedir=/usr/local/system/mysql --datadir=/usr/local/system/mysql/var --user=mysql --log-error=/usr/local/system/mysql/var/ubuntu.err --pid-file=/usr/local/system/mysql/var/ubuntu.pid --socket=/tmp/mysql.sock --port=3306
可以看出在var下 ，注意 var目录的用户是 mysql ，必须root用户才能cd进入
sudo su # 切换到root用户4,启动rails project报错:因为mysql gem的版本过高的原因
uninitialized constant MysqlCompat::MysqlRes (NameError) >sudo apt-get install libmysqlclient-dev >gem install mysql -v=2.7 --no-ri --no-rdoc
SEE:
http://blog.sitearth.com/ubuntu%E4%B8%8A%E6%90%AD%E5%BB%BAlamp%E7%8E%AF%E5%A2%83%E7%AC%94%E8%AE%B0%E2%80%94%E2%80%94mysql%E6%BA%90%E7%A0%81%E5%AE%89%E8%A3%85%E5%8F%8A%E9%85%8D%E7%BD%AE/
http://51jsp.cn/html/ror/2010/0327/14859.html
see:http://qichunren.javaeye.com/blog/577556
环境:ruby 1.8.7
我一直以为 h 是rails里的源码 ，其实是ruby里的erb.rb 中封装的
rails中,在页面输出的时候,h方法很常用 ,html , javascript ,ifream 都是源码输出，不会被浏览器执行了，其实现原理非常之简单,就是CGI.escapeHTML 的效果，代码都一样,一句正则的事情:
rails 中 h 使用方法:
<%= "<strong>HEY</strong>"%> <%=h "<strong>HEY</strong>"%>
生成页面源码:
<strong>HEY</strong> <!-- 效果加粗输出 --> <strong>HEY</strong> <!-- 浏览器显示 : <strong>HEY</strong> -->
ruby 中 h 使用方法：
require 'erb' p ERB::Util.h "<strong>HEY</strong>"
来看看 h 的源码:
/usr/local/system/ruby/lib/ruby/1.8/erb.rb
def html_escape(s) s.to_s.gsub(/&/, "&").gsub(/\"/, """).gsub(/>/, ">").gsub(/</, "<") end alias h html_escape
CGI.escapeHTML 源码:
/usr/local/system/ruby/lib/ruby/1.8/cgi.rb
def CGI::escapeHTML(string) string.gsub(/&/n, '&').gsub(/\"/n, '"').gsub(/>/n, '>').gsub(/</n, '<') end
那么放过来怎么转呢,CGI.unescapeHTML即可
建议打开源码看下，还有常用的 url encode(escape) , decode(unescape) 等等的用法，让你不虚此行
简单的demo:
require 'rubygems' require 'nokogiri' require 'erb' require 'cgi' str = "<strong>HEY</strong>" str1 = "<strong>HEY</strong>" url = "http://blog.wxianfeng.com" doc = Nokogiri::HTML str doc1 = Nokogiri::HTML str1 p doc.inner_html # "<html><body><strong>HEY</strong></body></html>" p doc1.inner_html # "<html><body><p><strong>HEY</strong></p></body></html>" p CGI.unescapeHTML(str1) # "<strong>HEY</strong>" p CGI.escapeHTML(str) # "<strong>HEY</strong>" p ERB::Util.h str # "<strong>HEY</strong>" p CGI.escape(url) # "http%3A%2F%2Fblog.wxianfeng.com" p CGI.unescape(CGI.escape(url)) # "http://blog.wxianfeng.com"
你知道你目前的项目代码有多少行吗？有多少个文件吗？有多少个文件夹吗？。。。^o(∩∩)o…哈哈，这个很简单，一句shell就搞定了，效率还非常之高:
1,统计你项目的.rb 结尾的代码行数，去掉空格
find . -type f -name "*.rb" | xargs cat | grep -v ^$ | wc -l
当然你还可以添加去掉注释
2,统计项目文件所有行数，包括空行
find . -type f | xargs cat | wc -l
3，统计项目有多少个文件
find . -type f | wc -l
4，统计项目有多少个文件夹
find . -type d | wc -l
5，找出项目下.rb 结尾的文件行数最大的一个(由小到大排序)
find . -type f -name "*.rb" | xargs wc -l | sort -n6，自由发挥
总之find 命令结合 xargs 很强大的说
这些都是基本的用法，例如上面想得到tar.gz 等压缩包的内容就难了，那么可以借助cloc(perl库)得到更详细的信息,各种文件类型的行数，注释，空行等等信息:
ubuntu 安装:
sudo apt-get install cloc
使用:
wxianfeng@ubuntu:/usr/local/system/projects/redmine_1_0_3$ cloc . 6455 text files. 3119 unique files. 1035 files ignored. http://cloc.sourceforge.net v 1.09 T=13.0 s (204.8 files/s, 25293.4 lines/s) ------------------------------------------------------------------------------- Language files blank comment code scale 3rd gen. equiv ------------------------------------------------------------------------------- Ruby 2076 33371 44800 178357 x 4.20 = 749099.40 YAML 197 1299 691 44512 x 0.90 = 40060.80 Javascript 105 1963 2111 12461 x 1.48 = 18442.28 Ruby HTML 241 716 29 4862 x 4.00 = 19448.00 CSS 22 366 102 1889 x 1.00 = 1889.00 HTML 15 120 3 627 x 1.90 = 1191.30 Perl 2 80 98 233 x 4.00 = 932.00 SQL 3 17 2 96 x 2.29 = 219.84 XML 1 0 0 9 x 1.90 = 17.10 ------------------------------------------------------------------------------- SUM: 2662 37932 47836 243046 x 3.42 = 831299.72 -------------------------------------------------------------------------------
另外 rails 中已经封装了一个rake 任务，用来统计的，瞧瞧:
wxianfeng@ubuntu:/usr/local/system/projects/blog.wxianfeng.com$ rake stats (in /usr/local/system/projects/blog.wxianfeng.com) +----------------------+-------+-------+---------+---------+-----+-------+ | Name | Lines | LOC | Classes | Methods | M/C | LOC/M | +----------------------+-------+-------+---------+---------+-----+-------+ | Controllers | 2422 | 1978 | 36 | 215 | 5 | 7 | | Helpers | 858 | 712 | 0 | 103 | 0 | 4 | | Models | 3360 | 2661 | 55 | 447 | 8 | 3 | | Libraries | 1203 | 884 | 30 | 143 | 4 | 4 | | APIs | 436 | 353 | 17 | 23 | 1 | 13 | | Functional tests | 16 | 12 | 2 | 0 | 0 | 0 | | Unit tests | 16 | 12 | 3 | 0 | 0 | 0 | | Model specs | 2094 | 1680 | 1 | 24 | 24 | 68 | | View specs | 249 | 200 | 0 | 12 | 0 | 14 | | Controller specs | 3507 | 2734 | 2 | 37 | 18 | 71 | | Helper specs | 53 | 39 | 0 | 0 | 0 | 0 | | Library specs | 15 | 11 | 0 | 0 | 0 | 0 | +----------------------+-------+-------+---------+---------+-----+-------+ | Total | 14229 | 11276 | 146 | 1004 | 6 | 9 | +----------------------+-------+-------+---------+---------+-----+-------+ Code LOC: 6588 Test LOC: 4688 Code to Test Ratio: 1:0.7
see:
http://bbs.chinaunix.net/viewthread.php?tid=1665204
http://garfileo.is-programmer.com/2010/6/11/lines-counting-using-cloc.18828.html
多行匹配也很常见，例如截取html源码的时候很有用,实现多行匹配只需要在正则后面加m即可 例如
/http:(.*?)\s?/mruby demo:
1
p "ab\r\n334cd".match(/ab(.*)cd/) # nil p "ab\r\n334cd".match(/ab(.*)cd/m) # #<MatchData "ab\r\n334cd" 1:"\r\n334">
2,
str = "<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\" \"http://www.w3.org/TR/REC-html40/loose.dtd\">\n<html><body><pre>\n<code class=\"ruby\">\nputs \"hello world\"\nputs \"hello world\"\n</code>\n</pre></body></html>\n" p str.match(/<body>(.*)<\/body>/m)[0] # "<body><pre>\n<code class=\"ruby\">\nputs \"hello world\"\nputs \"hello world\"\n</code>\n</pre></body>" p str.match(/<body>(.*)<\/body>/)[0] # nil
环境:ruby 1.8.7 + rails 2.3.5 + swfupload
swfupload 上传文件很方便，支持多文件上传，但是在往往需要做知道这张图片是谁传的，这样就需要取当前登录的session，这样就会出现问题，
因为图片是通过flash传上来的，swfupload里的session和rails里的session不是同一个，理论上属于跨域问题了，所以rails取不到session值，所以必须解决session问题，网络上大家一般都是通过修改session来解决的，即吧session的参数从swfupload里给从传到后台，方可验证通过，eg: http://huacnlee.com/blog/rails-multi-files-upload-with-swfupload
我是通过关闭session,通过参数来验证的,例如传login名字,得到当前是哪个用户:
controller:
class CkeditorController < ApplicationController skip_before_filter :verify_authenticity_token, :only => [:create] session :off , :only => [:create] def create @record.user ||= User.find_by_login(params[:login]) end end
view 页面上:注意中文注释部分
<script>
window.onload = function() {
upload1 = new SWFUpload({
// Backend Settings
upload_url: "/ckeditor/create",
post_params: {"login" : <%= current_user.login %>,"dir":dir}, // 这里很重要
// File Upload Settings
file_size_limit : "102400", // 100MB
file_types : "*.*",
file_types_description : "All Files",
file_upload_limit : 100,
file_queue_limit : 0,
// Event Handler Settings (all my handlers are in the Handler.js file)
swfupload_preload_handler : preLoad,
swfupload_load_failed_handler : loadFailed,
file_dialog_start_handler : fileDialogStart,
file_queued_handler : fileQueued,
file_queue_error_handler : fileQueueError,
file_dialog_complete_handler : fileDialogComplete,
upload_start_handler : uploadStart,
upload_progress_handler : uploadProgress,
upload_error_handler : uploadError,
upload_success_handler : uploadSuccess,
upload_complete_handler : uploadComplete,
// Button Settings
button_image_url : "/images/XPButtonUploadText_61x22.png",
button_placeholder_id : "spanButtonPlaceholder1",
button_width: 61,
button_height: 22,
// Flash Settings
flash_url : "/javascripts/swfupload/swfupload.swf",
flash9_url : "/javascripts/swfupload/swfupload_fp9.swf",
custom_settings : {
progressTarget : "fsUploadProgress1",
cancelButtonId : "btnCancel1"
},
// Debug Settings
debug: false
});
}
</script>
环境:ubuntu 10.10 + ibus + netbeans 6.9.1
这个问题老早就遇到了，就是一直没解决，今天算是找到一个完美的办法了，用过fcitx ,scim ,ibus 输入法，都会有同样的问题,以前遇到的解决办法
1,重启netbeans
2,重启输入法
完美解决办法:
在桌面上新建一个shell文件,然后拖到你的panel上，每次启动netbeans的时候，点击panel上的这个shell文件就ok了
相当于 终端上执行了 >LANG=zh_CN.UTF-8 /bin/sh “/usr/local/system/netbeans-6.9.1/bin/netbeans” —locale en_US
>vim nb.sh #!/bin/sh LANG=zh_CN.UTF-8 /bin/sh "/usr/local/system/netbeans-6.9.1/bin/netbeans" --locale en_US >chmod +x nb.sh
or
>vim nb.sh #!/bin/sh /bin/sh "/usr/local/system/netbeans6_9/bin/netbeans" --locale zh_CN.UTF-8 >chmod +x nb.sh
终端 daemon 执行:
nohup /bin/sh "/usr/local/system/netbeans6_9/bin/netbeans" --locale zh_CN.UTF-8 &