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How to chain scope queries with OR instead of AND?

I'm using Rails3, ActiveRecord 19 Answers 19 ...
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How can I see the size of files and directories in linux? [closed]

How can I see the size of files and directories in Linux? If use df -m , then it shows the size of all the directory at the top level, but, for the directories and files inside the directory, how do I check the size? ...
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SQL DROP TABLE foreign key constraint

If I want to delete all the tables in my database like this, will it take care of the foreign key constraint? If not, how do I take care of that first? ...
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Scala 2.8 breakOut

In Scala 2.8 , there is an object in scala.collection.package.scala : 4 Answers 4 ...
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Empty set literal?

[] = empty list 7 Answers 7 ...
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Argparse: Required argument 'y' if 'x' is present

...d after the first parsing while parsing the remaining arguments the second time. That way, in the the end, after all the parsing is done, you'll have a single namespace with all the options. Drawbacks: If --prox is not present the other two dependent options aren't even present in the namespace...
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Should I use .done() and .fail() for new jQuery AJAX code instead of success and error

...Laffargue's post: jqXHR.done() is faster! jqXHR.success() have some load time in callback and sometimes can overkill script. I find that on hard way before. UPDATE: Using jqXHR.done(), jqXHR.fail() and jqXHR.always() you can better manipulate with ajax request. Generaly you can define ajax in so...
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Section vs Article HTML5

I have a page made up of various "sections" like videos, a newsfeed etc.. I am a bit confused how to represent these with HTML5. Currently I have them as HTML5 <section> s, but on further inspection it looks they the more correct tag would be <article> . Could anyone shed some light on...
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App Inventor 2 软件著作权(软著)申请指南 · App Inventor 2 中文网

创建 Apps 首页 教育 中文教育版 各版本对比 App上架指南 入门必读 IoT专题 AI2拓展 Aia Store 关于 关于我们 发布日志 服务条款 ...
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Format numbers in django templates

I'm trying to format numbers. Examples: 13 Answers 13 ...