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Difference between “@id/” and “@+id/” in Android

In @+id/ the plus symbol + instructs to create a new resource name and add in to the R.java file but what about @id/ ? From the documentation of ID : when referencing an Android resource ID , you do not need the plus symbol, but must add the android package namespace, like so: ...
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Object-orientation in C

...ject at runtime! You just reassign it a new vtable pointer. You can even selectively change some of the virtual functions while keeping others, creating new hybrid types. Just be careful to create a new vtable instead of modifying the global vtable, otherwise you'll accidentally affect all object...
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What are the pros and cons to keeping SQL in Stored Procs versus Code [closed]

...non performant table or that which uses a higher level of serialization or select *'s in the code etc. It becomes easier to find schema changes / data manipulation logic changes when all of it is listed in one file. It becomes easier to do search and replace edits on SQL when they are in the same ...
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Impossible to Install PG gem on my mac with Mavericks

...ks. Here's what I did: Install the xcode command line tools first: xcode-select --install Download and install the latest version of PostgreSQL (9.3.1), in my case I just used the graphical installer. Here's the link to the downloads page: http://www.enterprisedb.com/products-services-training/...
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Is VB really case insensitive?

... You can turn off auto-correct by cheating. Right-click on a vb file and select "Open With". Then pick something like "XML (Text) Editor". You will lose all the VB-specific functionality like auto-correct. – Jonathan Allen Feb 20 '10 at 20:03 ...
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What is the most accurate way to retrieve a user's correct IP address in PHP?

...and anonymous proxy servers is just something I'll have to deal with for a select group of individuals. – Corey Ballou Oct 28 '09 at 10:04 ...
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What is the difference between id and class in CSS, and when should I use them? [duplicate]

Here I gave an id to the div element and it's applying the relevant CSS for it. 15 Answers ...
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How can I change Mac OS's default Java VM returned from /usr/libexec/java_home

...y the System Preferences Java Control Panel doesn't just present a list to select from, rather than have to resort to shell scripts/commands. I suspect this is just for Applets that run in the browser... – JGFMK Aug 14 '14 at 17:56 ...
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Is there more to an interface than having the correct methods

... How did this get selected as the answer? It's a brief description of why polymorphism is useful, but as the poster above said, I would expect a better explanation of multiple interfaces and even more importantly when it is appropriate to use ...
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Finding all cycles in a directed graph

... This answer is much better than the answer selected. I struggled for quite a while trying to figure out how to get all simple cycles from the strongly connected components. It turns out this is non-trivial. The paper by Johnson contains a great algorithm, but is a lit...