jquery memo tips (2)

split, parents, replace
<br /> var element = $(element);<br /> // split : 用#分開弄成的陣列的第二個<br /> size = element.attr('href').split('#')[1];<br /><br /> // parents 裡面有 selected class 的 下面的 img element<br /> img = element.parents(".selected").removeClass("selected").find("img")<br /><br /> //把 _thumb 取代成 後面的 size+'.'<br /> src = img.attr('src').replace(/_thumb./, size+'.');<br />

jquery fade hightlight

hightlightFade

做新訊息出來的時, hightlight 效果很方便

jquery memo tips

<br /> // 被選到的 option 的值<br /> $('select option:selected').attr('value')<br /><br /> //除了第一個option 都砍掉<br /> $('select option:not(:first-child)').remove();<br /><br />//把value 1 的option 設成選擇<br /> $('#system_id option[value=1]').attr('selected', 'selected');<br />

timezone 時區 , rails , browser

What is the best way to detect and store the timezone the client of a web app is in?
Detecting Browser Time Zone with Rails

Rails 2.1 Time Zone Support: An Overview
What's New in Edge Rails: Easier Timezones

HowtoSetDefaultTimeZone

Rails 2.3 Extras

Rails 2.3 Extras

Batch Find
What's New in Edge Rails: Batched Find

One quick caveat exists: you can’t specify :order or :limit in the options to find_each or find_in_batches as those values are used in the internal looping logic.

Batched finds are best used when you have a potentially large dataset and need to iterate through all rows. If done using a normal find the full result-set will be loaded into memory and could cause problems. With batched finds you can be sure that only 1000 * (each result-object size) will be loaded into memory

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Dynamic Scopes
What's New in Edge Rails: Dynamic Scope Methods

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Default Scopes
What's New in Edge Rails: Default Scoping

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Object#try
try()

you can avoid nil-checking by writing code like <%= @person.try(:name) %>. Well, now it’s baked right into Rails. As implemented in Rails, it raises NoMethodError on private methods and always returns nil if the object is nil.

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Smart Rendering of Partials
What's New in Edge Rails: render Stops Being High-Maintenance

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Unified Rendering
#order version<br />render :file => '/tmp/random_file.erb' <br />render :template => 'other_controller/action' <br />render :action => 'show'<br /><br />#Rails 2.3<br />render '/tmp/random_file.erb' <br />render 'other_controller/action' <br />render 'show' <br />render :show <br />

rails engines

把一支 app 可以像plugin 一樣 裝到另外一支 application 裡

Rails Engines railscast
Engines in Rails 2.3
Rails Engines Make your plugins more powerful.

masterview in rails, layout

Masterview template engine
masterview quick start