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Read only file system on Android

I recently rooted my Droid X and everything seems to be working perfectly. I made some changes to build.prop and when I do adb push build.prop /system/ I get the following error: failed to copy 'c:\build.prop' to '/system//build.prop': Read-only file system . ...
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JPA or JDBC, how are they different?

I am learning Java EE and I downloaded the eclipse with glassfish for the same. I saw some examples and also read the Oracle docs to know all about Java EE 5. Connecting to a database was very simple. I opened a dynamic web project, created a session EJB , I used EntityManager and with the get meth...
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How does git store files?

I just started learning git and to do so I started reading the Git Community Book , and in this book they say that SVN and CVS store the difference between files and that git stores a snapshot of all the files. ...
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How to rotate portrait/landscape Android emulator? [duplicate]

...imes the app relays its self out on the screen.. so how do I simulate rotating a phone with the emulator? On the Blackberry emulators there's a button in the menu to turn the phone, but I can't find it or any option on the Android ones? ...
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ggplot2 plot without axes, legends, etc

I want to use bioconductor's hexbin (which I can do) to generate a plot that fills the entire (png) display region - no axes, no labels, no background, no nuthin'. ...
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How to check if an NSDictionary or NSMutableDictionary contains a key?

... And what if the key does exist, but it's corresponding value is nil? – Fyodor Soikin May 6 '10 at 21:30 232 ...
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Hibernate throws org.hibernate.AnnotationException: No identifier specified for entity: com..domain.

Why am I getting this exception? 9 Answers 9 ...
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UIRefreshControl - beginRefreshing not working when UITableViewController is inside UINavigationCont

I've setup a UIRefreshControl in my UITableViewController (which is inside a UINavigationController) and it works as expected (i.e. pull down fires the correct event). However, if I programmatically invoke the beginRefreshing instance method on the refresh control like: ...
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ThreadStatic v.s. ThreadLocal: is generic better than attribute?

[ThreadStatic] is defined using attribute while ThreadLocal<T> uses generic. Why different design solutions were chosen? What are the advantages and disadvantages of using generic over attributes in this case? ...
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What is the proper #include for the function 'sleep()'?

I am using the Big Nerd Ranch book Objective-C Programming, and it starts out by having us write in C in the first few chapters. In one of my programs it has me create, I use the sleep function. In the book it told me to put #include <stdlib.h> under the #include <stdio.h> part. This...