看标题还以为又用新技术了……

对于 Ruby 来说 eval() 真的足够了。

#3 楼 @lgn21st 深藏功与名。

神作啊！

#22 楼 @hlxwell 什么要求一定要在 Model 里实现？LZ 描述的需求貌似是要导出，在 Controller 里实现不就行了？？

#11 楼 @aptx4869 这个提示符萌爆了……

#42 楼 @ghjcumt2008 自从我吧“酷工作”和“二手交易”屏蔽后，我发现 V2EX 质量高多了。

render_string 再抓回来不行吗？

@Rei

被 @doitian 提到了哈〜 相当反感这样的 Hack，很没必要，而且不干净。 况且不是以“r”开头的 Gem 就没辙了，还不如扫描所有参数，然后 def method_missing ... end 。

鲜虾鱼板。

V2EX 才是！

264 cd
247 ls
136 sudo
71 git
50 pwd
47 rm
43 vim
40 subl
39 clear
38 nw

最近用 node-webkit 写了点小前端……所以榜上有名了。

曾经在 V2EX 上很火的。

#13 楼 @dorentus 我以段为单位……

自动补全 + 拼写检查

#2 楼 @xuangong

:set listchars=trail:-

#20 楼 @xhj6 “信赖” -> “依赖”？这不算高端黑么？ @ashchan

#7 楼 @chairy11 我只是想说：“Sinatra 这么轻量的框架都有那么漂亮的报错，Rails……” #14 楼 @Ryan gem 'better_errors' 你懂的（http://railscasts.com/episodes/402-better-errors-railspanel）。

Sinatra 原生的报错也很美观呀～

仔细看 缩进 。

1. In the Project, select the item or items you want to add to favorites.
2. Do one of the following:
   • On the main menu, point to File | Add To Favorites.
   • On the context menu of the selection, point to Add To Favorites 3.Something else

1.  In the Project, select the item or items you want to add to favorites.
2.  Do one of the following:
    -    On the main menu, point to File | Add To Favorites.
    -   On the context menu of the selection, point to Add To Favorites
3.Something else

差点，路上…… #28 楼 @RainFlying 目测 zsh。

#16 楼 @blacktulip 收我国电影审查制度影响，在我国，电影的正版与盗版，不是合法与不合法的问题，而是有与没有的问题。

#9 楼 @fenprace If you use Ubuntu and some other linux distributions, the root password is unknown actually. You can have a try to run su, and input your password. You'll get an error.

To run a shell as the root, you can run sudo su, it means running su as the root. And the su command will start a shell. Simply running sudo bash is also available.

This problem won't happen on Archlinux, Gentoo and most of the server linux distributions. Because on these linux distributions, the root's password is set by user before the installation and the password is known. So if you are using one of the above, just running sualso works well.

#8 楼 @crazyjin Your PATH varibale is different from root's, you could run it to prove it:

$ echo $PATH
$ sudo su
# echo $PATH

To solve your problem, you could simply create a symolic link:

sudo ln -s /opt/mongodb/bin/* /usr/local/bin

Because it said "Permission denied" Mongodb created /db/data as the default directory to store the database after installing, and it belongs to root defaultly.

chown <UR USERNAME> /data/db

高一在校算不算？

#2 楼 @jiyinyiyong codeschool.com

我走的貌似是 14……