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Pass a data.frame column name to a function

I'm trying to write a function to accept a data.frame ( x ) and a column from it. The function performs some calculations on x and later returns another data.frame. I'm stuck on the best-practices method to pass the column name to the function. ...
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How to add global ASP.Net Web Api Filters?

...ng System.Web.Http.Filters.ActionFilterAttribute ) but I am unable to get it to work inside of ASP.Net MVC 4. I tried adding it to the RegisterGlobalFilters() method but that didn't work. ...
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Maximum concurrent Socket.IO connections

This question has been asked previously but not recently and not with a clear answer. 5 Answers ...
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Jquery: how to trigger click event on pressing enter key

....8/jquery.min.js"></script> <meta charset=utf-8 /> <title>JS Bin</title> </head> <body> <textarea id="txtSearchProdAssign"></textarea> <input type="text" name="butAssignProd" placeholder="click here"> </body> </html> ...
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surface plots in matplotlib

... For surfaces it's a bit different than a list of 3-tuples, you should pass in a grid for the domain in 2d arrays. If all you have is a list of 3d points, rather than some function f(x, y) -> z, then you will have a problem because th...
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How to set the width of a cell in a UITableView in grouped style

... been working on this for about 2 days, so i thought i share my learnings with you. 7 Answers ...
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Delete first character of a string in Javascript

...follow | edited Aug 18 at 17:04 Max 30922 gold badges44 silver badges1616 bronze badges a...
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How to [recursively] Zip a directory in PHP?

...)); if (is_dir($source) === true) { $files = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($source), RecursiveIteratorIterator::SELF_FIRST); foreach ($files as $file) { $file = str_replace('\\', '/', $file); // Ignore "." and ...
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Does MySQL foreign_key_checks affect the entire database?

... It is session-based, when set the way you did in your question. https://dev.mysql.com/doc/refman/5.7/en/server-system-variables.html According to this, FOREIGN_KEY_CHECKS is "Both" for scope. This means it can be set for se...
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How to create an empty file at the command line in Windows?

... Without redirection, Luc Vu or Erik Konstantopoulos point out to: copy NUL EMptyFile.txt copy /b NUL EmptyFile.txt "How to create empty text file from a batch file?" (2008) also points to: type NUL > EmptyFile.txt # a...