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Show data on mouseover of circle

...I mouseover one of the circles I would like it to popup with data (like x, y values, maybe more). Here is what I tried using: ...
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Printing a variable memory address in swift

Is there anyway to simulate the [NSString stringWithFormat:@"%p", myVar] , from Objective-C, in the new Swift language? 15...
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Elegant ways to support equivalence (“equality”) in Python classes

When writing custom classes it is often important to allow equivalence by means of the == and != operators. In Python, this is made possible by implementing the __eq__ and __ne__ special methods, respectively. The easiest way I've found to do this is the following method: ...
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Difference between new and override

... The override modifier may be used on virtual methods and must be used on abstract methods. This indicates for the compiler to use the last defined implementation of a method. Even if the method is called on a reference to the base class ...
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vertical & horizontal lines in matplotlib

I do not quite understand why I am unable to create horizontal and vertical lines at specified limits. I would like to bound the data by this box. However, the sides do not seem to comply with my instructions. Why is this? ...
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What is the Ruby (spaceship) operator?

What is the Ruby <=> (spaceship) operator? Is the operator implemented by any other languages? 6 Answers ...
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Matplotlib 2 Subplots, 1 Colorbar

I've spent entirely too long researching how to get two subplots to share the same y-axis with a single colorbar shared between the two in Matplotlib. ...
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Loop backwards using indices in Python?

I am trying to loop from 100 to 0. How do I do this in Python? 15 Answers 15 ...
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What does the star operator mean, in a function call?

What does the * operator mean in Python, such as in code like zip(*x) or f(**k) ? 5 Answers ...
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How to pass arguments to a Button command in Tkinter?

Suppose I have the following Button made with Tkinter in Python: 18 Answers 18 ...