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Get statistics for each group (such as count, mean, etc) using pandas GroupBy?

I have a data frame df and I use several columns from it to groupby : 7 Answers 7 ...
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Count number of occurrences of a pattern in a file (even on same line)

When searching for number of occurrences of a string in a file, I generally use: 5 Answers ...
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Outline radius?

Is there anyway of getting rounded corners on the outline of a div element , similar to border-radius ? 19 Answers ...
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Best way to read a large file into a byte array in C#?

I have a web server which will read large binary files (several megabytes) into byte arrays. The server could be reading several files at the same time (different page requests), so I am looking for the most optimized way for doing this without taxing the CPU too much. Is the code below good enough?...
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How to link to a named anchor in Multimarkdown?

I have come across a number of mentions of MultiMarkdown's support for internal links / named anchors but I am unable to find a single example of how to actually do it. ...
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How to determine the memory footprint (size) of a variable?

Is there a function in PHP (or a PHP extension) to find out how much memory a given variable uses? sizeof just tells me the number of elements/properties. ...
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Setting a property by reflection with a string value

I'd like to set a property of an object through Reflection, with a value of type string . So, for instance, suppose I have a Ship class, with a property of Latitude , which is a double . ...
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Call an activity method from a fragment

Trying to call a method in my activity from a fragment. I want the fragment to give the method data and to get the data when the method return. I want to achieve similar to call on a static method, but without the use of static because it create problems in the activity. ...
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What is the use of the %n format specifier in C?

What is the use of the %n format specifier in C? Could anyone explain with an example? 10 Answers ...
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How to organize large R programs?

When I undertake an R project of any complexity, my scripts quickly get long and confusing. 11 Answers ...