<%=j %> 是啥意思

#2 楼 @huacnlee 谢谢！可以了。

HELP

#18 楼 @rei 开发环境 rails s 启动之后出了两个 Exiting 就结束了，如果把 config/puma.rb 删掉再启动，localhost 能看到报错页面

#16 楼 @rei 和 rails 版本有关系么

#14 楼 @rei 今早下的代码

puma.rb 部分代码如下

app_root = '/home/ruby/www/ruby-china/current'
pidfile "#{app_root}/tmp/pids/puma.pid"
state_path "#{app_root}/tmp/pids/puma.state"
bind "unix:/tmp/unicorn.ruby-china.sock"

#11 楼 @rei

/home/vagrant/.rvm/gems/ruby-2.3.0/gems/rack-2.0.0.alpha/lib/rack/server.rb:362:in `delete': No such file or directory @ unlink_internal - /vagrant/tmp/pids/server.pid (Errno::ENOENT)
    from /home/vagrant/.rvm/gems/ruby-2.3.0/gems/rack-2.0.0.alpha/lib/rack/server.rb:362:in `block in write_pid'
vagrant@ruby-china-dev:/vagrant$ cd tmp/pids
vagrant@ruby-china-dev:/vagrant/tmp/pids$ ls
vagrant@ruby-china-dev:/vagrant/tmp/pids$ 

下面没有 server.pid

vagrant@ruby-china-dev:/vagrant$ rails s -b 0.0.0.0
=> Booting Puma
=> Rails 5.0.0.beta3 application starting in development on http://0.0.0.0:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
=> Memory usage: 156.73 MB
[24430] Puma starting in cluster mode...
[24430] * Version 3.0.2 (ruby 2.3.0-p0), codename: Plethora of Penguin Pinatas
[24430] * Min threads: 8, max threads: 16
[24430] * Environment: development
[24430] * Process workers: 4
[24430] * Preloading application
[24430] * Listening on tcp://0.0.0.0:3000
[24430] * Daemonizing...
Exiting
Exiting
/home/vagrant/.rvm/gems/ruby-2.3.0/gems/rack-2.0.0.alpha/lib/rack/server.rb:362:in `delete': No such file or directory @ unlink_internal - /vagrant/tmp/pids/server.pid (Errno::ENOENT)
    from /home/vagrant/.rvm/gems/ruby-2.3.0/gems/rack-2.0.0.alpha/lib/rack/server.rb:362:in `block in write_pid'

这是为啥，rack 已装

#21 楼 @pathbox 17 楼的方法应该可行

#17 楼 @pathbox 第一个 person 的 self 是 singleton，第二个 person 的 self 是 person

#12 楼 @taojay315 感觉理解为类扩展的扩展好像能更清晰一点

#8 楼 @zzwzzhao 好奇心

#3 楼 @liwei78 谢谢提供的资料

#6 楼 @watraludru yep

#1 楼 @bird_on_rails 好😂

👍

#6 楼 @esnill 对的

我是看完了 ror tutorial 之后就开始看 ruby 元编程

[email protected]

👍🏽

谢谢分享👍

#7 楼 @zhulinpinyu 满了－ － 还收人吗？

#4 楼 @lgn21st 怎么加入呢？