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How to create Android Facebook Key Hash?

I do not understand this process at all. I have been able to navigate to the folder containing the keytool in the Java SDK. Although I keep getting the error openssl not recognised as an internal or external command. The problem is even if I can get this to work, what would I do and with what afterw...
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C# difference between == and Equals()

...resolve to System.Object.ReferenceEquals. Equals is just a virtual method and behaves as such, so the overridden version will be used (which, for string type compares the contents). share | improve...
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What is the difference between a var and val definition in Scala?

What is the difference between a var and val definition in Scala and why does the language need both? Why would you choose a val over a var and vice versa? ...
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How can I get the MAC and the IP address of a connected client in PHP?

I need to know the MAC and the IP address of the connect clients, how can I do this in PHP? 16 Answers ...
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Difference Between Schema / Database in MySQL

Is there a difference between a schema and a database in MySQL? In SQL Server, a database is a higher level container in relation to a schema. ...
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Showing all errors and warnings [duplicate]

...iguration option will keep this new value during the script's execution , and will be restored at the script's ending . – jave.web Dec 8 '14 at 22:04 ...
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Thou shalt not inherit from std::vector

... the hell it is before using it. What's the difference between std::vector and MyVector? Which one is better to use here and there? What if I need to move std::vector to MyVector? May I just use swap() or not? Do not produce new entities just to make something to look better. These entities (especi...
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What is the difference between “expose” and “publish” in Docker?

I'm experimenting with Dockerfiles, and I think I understand most of the logic. However, I don't see the difference between "exposing" and "publishing" a port in this context. ...
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What are the differences between a pointer variable and a reference variable in C++?

I know references are syntactic sugar, so code is easier to read and write. 41 Answers ...
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When to call activity context OR application context?

...plicationContext() when you know why you are using getApplicationContext() and only when you need to use getApplicationContext(). To be blunt, "some programmers" use getApplicationContext() (or getBaseContext(), to a lesser extent) because their Java experience is limited. They implement an inner c...