Domon on Web

mysql> show variables;

## Use a fallback for CDN version window.jQuery || document.write('<script src="js/libs/jquery-1.7.2.min.js"><\/script>') ## Chain stuff Instead of this: $(“#mydiv”).hide(); $(“#mydiv”).css(“padding-left”, “50px”); Use this: $(“#mydiv”).hide().css(“padding-left”, “50px”); ## Cache stuff var $mydiv = $(“#mydiv”).hide(); $mydiv.show(); ## Use pure js $mydiv[0].setAttribute('class', 'awesome'); //you can convert jQuery objects to DOM nodes using $jqObj[0] ## Reference * [9 jQuery Mistakes you Shouldn’t Commit](http://webdesignledger.com/tips/9-jquery-mistakes-you-shouldnt-commit)

> cat -v typescript | sed -e "s/\x1b\[.\{1,5\}m//g"

> In jQuery, the `fn` property is just an alias to the `prototype` property.

> View > Make Text Bigger, Make Text Normal Size or Make Text Smaller

Programming Ruby: The Pragmatic Programmer's Guide

> In computer science, marshalling (sometimes spelled marshaling, similar to serialization) is the process of transforming the memory representation of an object to a data format suitable for storage or transmission. It is typically used when data must be moved between different parts of a computer program or from one program to another.

To make the Home and End keys move to the beginning and end of the current line (not the document), we can create a file called `~/Library/KeyBindings/DefaultKeyBinding.dict` and put the following lines into it: { /* Home and Shift-Home */ "\UF729" = "moveToBeginningOfLine:"; "$\UF729" = "moveToBeginningOfLineAndModifySelection:"; /* End and Shift-End */ "\UF72B" = "moveToEndOfLine:"; "$\UF72B" = "moveToEndOfLineAndModifySelection:"; } ## References * [Mac Switchers Tip: Remap the Home and End keys](http://lifehacker.com/225873/mac-switchers-tip--remap-the-home-and-end-keys) * [TextMate Blog » Key bindings for switchers](http://blog.macromates.com/2005/key-bindings-for-switchers/)

Create a new session with a session name: screen -S your_session_name Change the session name of current screen: C-a :sessionname your_session_name ## Reference * [Setting session name in screen](http://holmwood.id.au/~lindsay/2008/09/29/setting-session-name-in-screen/)

To check and repair permissions, click: `Verify Disk Permissions` and `Repair Disk Permissions`. ## Reference * [About Disk Utility's Repair Disk Permissions feature](http://support.apple.com/kb/HT1452)

`asset_path(source)` 預設會給 path，但 `config/environments/production.rb` 裡設定了 `asset_host` 時，會回傳完整的 url，包含 protocol 與 host。 ## Reference * [ActionView::Helpers::AssetTagHelper](http://api.rubyonrails.org/classes/ActionView/Helpers/AssetTagHelper.html)

Simply use: git rm --cached ## Reference * [git ready » ignoring doesn't remove a file](http://gitready.com/beginner/2009/03/06/ignoring-doesnt-remove-a-file.html)

I encountered this error when running a cucumber test: deadlock; recursive locking (ThreadError) :8:in `lock' :8:in `synchronize' It came the `gmail` gem. This is a known issue but have not yet been solved. Though there is a workaround provided by [saranyan](https://github.com/saranyan) which resolved the problem for me. Add ta line to `lib/gmail/client/base.rb`, in the beginning of the definition of the `mailbox(name, &block)` method: def mailbox(name, &block) + @mailbox_mutex = Mutex.new @mailbox_mutex.synchronize do ## Reference * [#28: Added Mutex.new statement to prevent deadlocking error by saranyan for nu7hatch/gmail - Pull Request - GitHub](https://github.com/nu7hatch/gmail/pull/28)

設定 `has_and_belongs_to_many` 的同時，必須準備一個 join table。 以 Developer 和 Project 兩個 model 為例，則 table 就叫做 `developer_project`，前後順序是以 String 的 `<` operator 比較得來。 設定時也可以指定 `:join_table`。 ## Reference * [ActiveRecord::Associations::ClassMethods](http://api.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html#method-i-has_and_belongs_to_many)

兩者都是 1-1 關係，差別只在 foreign key 放在哪個 table。 若 User `belong_to` Account，則 users table 裡會有 `account_id` 這個欄位。 ## Reference * [ActiveRecord::Associations::ClassMethods](http://api.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html)

Just fire this line of commands: gem list | cut -d" " -f1 | xargs gem uninstall -aIx ## Reference * [Painlessly Remove All Ruby Gems :: Geekystuff dot Net](http://geekystuff.net/2009/01/14/remove-all-ruby-gems/)

To view local man pages, give man a full or relative path, e.g.: man ./nginx.8 ## Reference * [Craic Computing Tech Tips: Viewing local man pages](http://craiccomputing.blogspot.com/2007/01/viewing-local-man-pages.html)