#{茶男與藍牌}
From the monthly archives: August 2011
from http://tagaholic.me/2009/05/11/demystifying-irb-commands.html
Irb is one of the most commonly used standard ruby libraries, yet most don’t seem to know much about it. I’ve lost count of the number of blog posts that explain some irb “tricks” or “secret” config options. This is the first in a series that aims to make irb less magical and more [...]
from http://tagaholic.me/2009/05/29/exploring-how-to-configure-irb.html#eval_history
In my last post we discussed irb’s commands. This post goes further into irb’s innards, exploring all of its configuration options.
Gettin Ready
For starters, I refer you to the pickaxe which has an excellent section on configuring irb. Also, this post assumes ruby 1.8.6 and irb 0.9.5, though it should apply to 1.9ers. [...]
from http://rails3blog.com/2010/09/error-no-such-file-to-load-readline-loaderror/
I was getting this error trying to start the rails console: error: no such file to load — readline (LoadError). I’m using rvm, rails3, ruby 1.9.2, Ubuntu 10.04.
I tracked down redline in my ruby source ~/.rvm/src/ruby-1.9.2-p0/ext/readline and ran:
ruby extconf.rb
This let me know I was missing these two packages:
libncurses5-dev [...]
from: http://stackoverflow.com/questions/6786983/how-do-i-get-gem-install-to-work-on-os-x-lion-with-ruby-1-8-7-without-seg-fault
Error output:
/Users/[my user]/.rvm/rubies/ruby-1.8.7-p352/lib/ruby/1.8/timeout.rb:60: [BUG] Segmentation fault ruby 1.8.7 (2011-06-30 patchlevel 352) [i686-darwin11.0.0]
Solution:
rvm remove 1.8.7 CC=/usr/bin/gcc-4.2 rvm install 1.8.7
If you don’t have gcc-4.2 with the latest XCode 4, then go to the following to install:
This trick is for Rails 3 (maybe Rails 2)
Just add a leading ‘^’ in the string as below:
validates_presence_of :role_id, :message => ‘^Please select a role’
from https://deviato.wordpress.com/2010/02/24/chameleon-2-rc4-for-intel-gma-version-2/
edit ”org.chameleon.boot.plist” or “com.apple.boot.plist” based on the version of Chameleon
<key>Graphics Mode</key>
<string>1280x720x32</string>
from http://www.linuxfocus.org/English/May2000/article130.shtml
Abstract:
This article explains how to configure sendmail and fetchmail on your local computer connected to the internet via a PPP link. Such a configuration allows you to use every Unix mail client (not only Netscape). You can send and fetch your messages each time you establish a PPP connection.
Workaround A: Finish the install
sudo apt-get clean
sudo aptitude download python-libvirt
sudo dpkg –unpack ./python-libvirt*.deb
sudo dpkg –configure python-libvirt
Workaround B: Remove the package and reinstall
sudo rm /var/lib/dpkg/info/flashplugin-installer.{postinst,prerm,postrm}
sudo apt-get remove –purge flashplugin-installer
sudo apt-get clean
sudo apt-get update
Then reinstall the package
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