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How to reshape data from long to wide format

I'm having trouble rearranging the following data frame: 11 Answers 11 ...
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Drawable image on a canvas

How can I get an image to the canvas in order to draw on that image? 6 Answers 6 ...
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Making heatmap from pandas DataFrame

I have a dataframe generated from Python's Pandas package. How can I generate heatmap using DataFrame from pandas package. ...
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Is there an expression for an infinite generator?

Is there a straight-forward generator expression that can yield infinite elements? 7 Answers ...
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Performance difference for control structures 'for' and 'foreach' in C#

Which code snippet will give better performance? The below code segments were written in C#. 9 Answers ...
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Underscore: sortBy() based on multiple attributes

I am trying to sort an array with objects based on multiple attributes. I.e if the first attribute is the same between two objects a second attribute should be used to comapare the two objects. For example, consider the following array: ...
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CGContextDrawImage draws image upside down when passed UIImage.CGImage

Does anyone know why CGContextDrawImage would be drawing my image upside down? I am loading an image in from my application: ...
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Change one value based on another value in pandas

I'm trying to reprogram my Stata code into Python for speed improvements, and I was pointed in the direction of PANDAS. I am, however, having a hard time wrapping my head around how to process the data. ...
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What's the main difference between int.Parse() and Convert.ToInt32

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Int division: Why is the result of 1/3 == 0?

I was writing this code: 16 Answers 16 ...