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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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What's the difference between `on` and `live` or `bind`?

... vs delegate. In future versions of jQuery, these methods will be removed and only on and one will be left. Examples: // Using live() $(".mySelector").live("click", fn); // Equivalent `on` (there isn't an exact equivalent, but with good reason) $(document).on("click", ".mySelector", fn); // ...
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vertical-align with Bootstrap 3

I'm using Twitter Bootstrap 3, and I have problems when I want to align vertically two div , for example — JSFiddle link : ...
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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...
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Find location of a removable SD card

...le via USB Mass Storage mode when mounted on a host machine", at least for Android 1.x and 2.x. But the question is about external SD. How to get a path like "/mnt/sdcard/external_sd" (it may differ from device to device)? Android has no concept of "external SD", aside from external storage, as de...
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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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In a PHP project, what patterns exist to store, access and organize helper objects? [closed]

How do you organize and manage your helper objects like the database engine, user notification, error handling and so on in a PHP based, object oriented project? ...
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Is there a way to keep Hudson / Jenkins configuration files in source control?

I am new to Hudson / Jenkins and was wondering if there is a way to check in Hudson's configuration files to source control. ...
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How do I terminate a thread in C++11?

...to terminate the thread correctly, or make it respond to a "terminate" command. I am interested in terminating the thread forcefully using pure C++11. ...
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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...