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Alternatives to dispatch_get_current_queue() for completion blocks in iOS 6?

I have a method that accepts a block and a completion block. The first block should run in the background, while the completion block should run in whatever queue the method was called. ...
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ADB Shell Input Events

What is the basic difference between adb shell input keyevent and adb shell sendevent ? Which one should I use for inputting a character? Are the keycodes the same that we pass to both the commands? ...
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What happens if you call erase() on a map element while iterating from begin to end?

In the following code I loop through a map and test if an element needs to be erased. Is it safe to erase the element and keep iterating or do I need to collect the keys in another container and do a second loop to call the erase()? ...
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How to run .APK file on emulator [duplicate]

I download an APK file and I want to run it on an Android emulator but I don't know how. Please help me. Thanks! 4 Answer...
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How to vertical align an inline-block in a line of text?

I want to create an inline-block that will take on some unknown width and height. (It'll have a table inside it with content dynamically generated). Further, the inline-block should be placed inside a line of text, such as "my text (BLOCK HERE)". To make it look pretty, I'm trying to make the blo...
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How to erase the file contents of text file in Python?

... #include<fstream> and then std::ofstream("file.txt"); about as short as in Python. :) – wilhelmtell May 4 '10 at 21:44 8 ...
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How do I use floating-point division in bash?

...$IMG_WIDTH/$IMG2_WIDTH") without $(( )) (double parentheses) ; which is expanded by the bash before executing command – Nahuel Fouilleul Oct 4 '12 at 7:32 ...
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SQL Server equivalent of MySQL's NOW()?

... SYSDATETIME() and SYSUTCDATETIME() are the DateTime2 equivalents of GetDate() and GetUTCDate() which return a DateTime. DateTime2 is now the preferred method for storing the date and time in SQL Server 2008+. See the following StackOv...
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initializing a Guava ImmutableMap

...tableMap class provides six different of() methods, accepting between zero and five key-value pairings. There is not an of(...) overload accepting a varags parameter because K and V can be different types. You want an ImmutableMap.Builder: ImmutableMap<String,String> myMap = ImmutableMap.&lt...
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Difference between `npm start` & `node app.js`, when starting app?

I have installed an application using the command express new 'filename' . I have just learned that you can start an application using: ...