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Codesign error: Certificate identity appearing twice

...same problem. It has been fixed. It came after I submitted an app and installed a few certificates to sign the app. Quick Fix: Open up KEYCHAIN ACCESS > click on MY CERTIFICATES> in there you will probably see iPhone Developer: . You will probably see it TWICE! Select the one with the earl...
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What to learn for making Java web applications in Java EE 6? [closed]

...s so cooool), and use Tomcat (and why not Jetty), or JBoss, or just forget all this and go for Grails, and bla bla bla...". But I don't think that this is really helping you and, without mentoring or guidance (and you won't find a non outdated unique resource covering all combinations), this must ...
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How do I hide .class files from the Open Resource dialog in Eclipse?

I won't want to have edit any working sets. I just want a way to, across all workspaces and projects, prevent .class files from ever showing in the Open Resource Dialog. Is there a way to do this? ...
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How far can memory leaks go?

I've run into memory leaks many times. Usually when I'm malloc -ing like there's no tomorrow, or dangling FILE * s like dirty laundry. I generally assume (read: hope desperately) that all memory is cleaned up at least when the program terminates. Are there any situations where leaked memory won't ...
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What's the difference between struct and class in .NET?

...or a struct, that means that the variable contains the entire struct, with all its fields. A variable containing a reference type contains a pointer, or a reference to somewhere else in memory where the actual value resides. This has one benefit, to begin with: value types always contains a valu...
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org.hibernate.MappingException: Could not determine type for: java.util.List, at table: College, for

I'm using Hibernate for all CRUD operations in my project. It doesn't work for One-To-Many and Many-To-One relationships. It gives me the below error. ...
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How can I make PHP display the error instead of giving me 500 Internal Server Error [duplicate]

This has never happened before. Usually it displays the error, but now it just gives me a 500 internal server error. Of course before, when it displayed the error, it was different servers. Now I'm on a new server (I have full root, so if I need to configure it somewhere in the php.ini, I can.) Or p...
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Update ViewPager dynamically?

...t is best to deal solely with getItem() and not touch instantiateItem() at all. The instantiateItem()-destroyItem()-isViewFromObject() interface on PagerAdapter is a lower-level interface that FragmentPagerAdapter uses to implement the much simpler getItem() interface. Before getting into this, I s...
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How to design a product table for many kinds of product where each product has many parameters

...the type hierarchy you describe: Single Table Inheritance: one table for all Product types, with enough columns to store all attributes of all types. This means a lot of columns, most of which are NULL on any given row. Class Table Inheritance: one table for Products, storing attributes common to...
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How to remove an item for a OR'd enum?

...amp; it with the ~ (complement) of 'BLUE'. The complement operator essentially reverses or 'flips' all bits for the given data type. As such, if you use the AND operator (&) with some value (let's call that value 'X') and the complement of one or more set bits (let's call those bits Q and thei...