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How to access pandas groupby dataframe by key

How do I access the corresponding groupby dataframe in a groupby object by the key? 5 Answers ...
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Why switch is faster than if

Lots of Java books describe the switch statement as being faster than the if else statement. But I did not find out anywhere why switch is faster than if . ...
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Join a list of strings in python and wrap each string in quotation marks

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An efficient way to transpose a file in Bash

I have a huge tab-separated file formatted like this 29 Answers 29 ...
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Using .NET, how can you find the mime type of a file based on the file signature not the extension

I am looking for a simple way to get a mime type where the file extension is incorrect or not given, something similar to this question only in .Net. ...
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Best practices/guidance for maintaining assembly version numbers

I'm looking for pointers, suggestions, and even dictation on how to manage the three different assembly version numbers for a .NET assembly. The Product version is the simplest, as this seems would normally be dictated by business. Then, the file version seems to be for versioning between deploym...
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Algorithm to detect corners of paper sheet in photo

What is the best way to detect the corners of an invoice/receipt/sheet-of-paper in a photo? This is to be used for subsequent perspective correction, before OCR. ...
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How to add a spinner icon to button when it's in the Loading state?

Twitter Bootstrap's buttons have a nice Loading... state available. 8 Answers 8 ...
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How exactly does the python any() function work?

In the python docs page for any , the equivalent code for the any() function is given as: 5 Answers ...
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WPF ToolBar: how to remove grip and overflow

In a nested WPF ToolBarPanel-ToolBar-Menu we want to get rid of the grip handle to the left and the overflow area to the right. they are both grayed out, but we'd like them to not be displayed at all. ...