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dplyr summarise: Equivalent of “.drop=FALSE” to keep groups with zero length in output

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Including Google Web Fonts link or import?

... edited Nov 22 '18 at 15:14 Sayed Mohd Ali 1,97833 gold badges77 silver badges2323 bronze badges answere...
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How can I rollback a github repository to a specific commit?

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Synchronously waiting for an async operation, and why does Wait() freeze the program here

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What is the difference between “int” and “uint” / “long” and “ulong”?

I know about int and long (32-bit and 64-bit numbers), but what are uint and ulong ? 5 Answers ...
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When would I use Task.Yield()?

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MySQL 'create schema' and 'create database' - Is there any difference

... 140 The documentation of MySQL says : CREATE DATABASE creates a database with the given name...
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Argparse optional positional arguments?

... techtonik 16.3k88 gold badges102102 silver badges124124 bronze badges answered Dec 18 '10 at 21:15 Vinay SajipVinay Sajip 80.8k11...
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Why is [1,2] + [3,4] = “1,23,4” in JavaScript?

...t how the + operator behaves in general also. So, here it goes. Excluding E4X and implementation-specific stuff, Javascript (as of ES5) has 6 built-in data types: Undefined Null Boolean Number String Object Note that although typeof somewhat confusingly returns object for Null and function for cal...
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Are static class instances unique to a request or a server in ASP.NET?

... 149 Your static classes and static instance fields are shared between all requests to the applicati...