#{茶男與藍牌}
From the monthly archives: October 2011
Can’t find anything about casting an instance to specified class? Of cause, in Ruby, there is no such concept that you need to cast an instance in most of the cases. But how about you need to? Here is the answer:
By using ActiveRecord::Persistence.becomes, you can easily cast it to specified class.
For example:
inspired by http://atastypixel.com/blog/textmate-git-diff-in-filemerge/
from http://stackoverflow.com/questions/723157/how-to-insert-a-newline-in-front-of-a-pattern sed “s/regexp/\\`echo -e ‘\n\r’`/g”
Hold the ‘option’ key in launchpad, you should see all the icons wiggle. Click on the redundant icon, and you should see a question mark watermark appearing in the icon Release ‘option’ key Hold the ‘option’ key again, you should see a delete icon at the top left corner of the redundant icon. Click at [...]
from: http://www.debian-administration.org/articles/317
Previously we showed how to add basic completion to commands, using facilities which were already provided by the bash completion routines. In this second part we’ll demonstrate how to add completely new custom completion to commands.
In part one we looked at adding hostname completion to arbitrary commands by executing:
complete -F _known_hosts xvncviewer [...]
from http://ar.rubyonrails.org/classes/ActiveRecord/ConnectionAdapters/PostgreSQLAdapter.html :host - Defaults to “localhost”. :port - Defaults to 5432. :username - Defaults to nothing. :password - Defaults to nothing. :database - The name of the database. No default, must be provided. :schema_search_path - An optional schema search path for the connection given as a string of comma-separated schema names. This is backward-compatible with the :schema_order option. :encoding - An optional [...]
p = Person.new p.first_name = ‘Tian’ p.last_name = nil p.first_name? # => true p.last_name? # => false
Issue: Hackintosh upgrading to 10.7.2, booting the Mac OS, then run into a panic that shows backtrace and is caused by ApplePolicyControl
Solution:
After upgrade, use other source which has terminal or finder (like mac os install usb) to boot, then remove the folder ApplePolicyControl.kext from /System/Library/Extensions/AppleGraphicsControl.kext/Contents/PlugIns reboot into the Mac OS
Good luck
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