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Window appears off screen on ubuntu [closed]

I have a dual monitor setup, and I am using Ubuntu 12.04 LTS I have changed the positioning of the monitors several times, and now for some reason some of the windows open up off-screen (outside of both screens), Update Manager, for instance. How can I position the windows on one of my screens? ...
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Why return NotImplemented instead of raising NotImplementedError

Python has a singleton called NotImplemented . 4 Answers 4 ...
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Check if multiple strings exist in another string

... "wholesome", "milk"] if any(x in a_string for x in matches): Similarly to check if all the strings from the list are found, use all instead of any. share | improve this answer | ...
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What is the difference between a User Control Library and a Custom Control Library?

I am just coming up to speed on WPF and would like to create a reusable WPF control. 2 Answers ...
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Why do I get AttributeError: 'NoneType' object has no attribute 'something'?

... You have a variable that is equal to None and you're attempting to access an attribute of it called 'something'. foo = None foo.something = 1 or foo = None print(foo.something) Both will yield an AttributeError: 'NoneType' ...
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How to convert a string to lower case in Bash?

Is there a way in bash to convert a string into a lower case string? 20 Answers 20 ...
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What's the difference between istringstream, ostringstream and stringstream? / Why not use stringstr

... Personally, I find it very rare that I want to perform streaming into and out of the same string stream. Usually I want to either initialize a stream from a string and then parse it; or stream things to a string stream and then extract the result and store it. If you...
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Scala actors: receive vs react

... First, each actor waiting on receive is occupying a thread. If it never receives anything, that thread will never do anything. An actor on react does not occupy any thread until it receives something. Once it receives something, a thread g...
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PHP shell_exec() vs exec()

I'm struggling to understand the difference between shell_exec() and exec() ... 4 Answers ...
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Is it possible to get the non-enumerable inherited property names of an object?

...few ways of getting the properties of an object, depending on what we want to get. 9 Answers ...