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Rails: redirect_to with :error, but flash[:error] empty

I'm trying to do a redirect while setting the flash[:error] value. (Rails 3.0.10) 3 Answers ...
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UIPopovercontroller dealloc reached while popover is still visible

I assure you that I did look for an answer in SO for my question but none of them were helpful. Here I got a simple code that should present a UIImagePickerController within a UIPopoverController : ...
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java SSL and cert keystore

How does my java program know where my keystore containing the certificate is? Or alternatively how do I tell my java program where to look for the keystore? ...
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What is the session's “secret” option?

I don't know anything about cryptography. I'm wondering what the session secret is. 3 Answers ...
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Scala equivalent of Java java.lang.Class Object

The question is best explained by an example: 2 Answers 2 ...
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How to simulate a touch event in Android?

How to simulate a touch event with Android while giving the X and Y coordinates manually? 7 Answers ...
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Replacing Pandas or Numpy Nan with a None to use with MysqlDB

I am trying to write a Pandas dataframe (or can use a numpy array) to a mysql database using MysqlDB . MysqlDB doesn't seem understand 'nan' and my database throws out an error saying nan is not in the field list. I need to find a way to convert the 'nan' into a NoneType. ...
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How to make Google Chrome JavaScript console persistent?

Since I'm building a dynamic site, I need to track the changes between pages, ie. Ajax calls, POST, GET stuff and similar stuff. ...
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How to reset a remote Git repository to remove all commits?

How can I reset a remote and local Git repository to remove all commits? 3 Answers 3 ...
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How to detect the device orientation using CSS media queries?

In JavaScript the orientation mode can be detected using: 5 Answers 5 ...