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What makes Lisp macros so special?
Reading Paul Graham's essays on programming languages one would think that Lisp macros are the only way to go. As a busy developer, working on other platforms, I have not had the privilege of using Lisp macros. As someone who wants to understand the buzz, please explain what makes this feature s...
What does the `#` operator mean in Scala?
I see this code in this blog: Type-Level Programming in Scala :
4 Answers
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Using helpers in model: how do I include helper dependencies?
I'm writing a model that handles user input from a text area. Following the advice from http://blog.caboo.se/articles/2008/8/25/sanitize-your-users-html-input , I'm cleaning up the input in the model before saving to database, using the before_validate callback.
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Replacing blank values (white space) with NaN in pandas
I want to find all values in a Pandas dataframe that contain whitespace (any arbitrary amount) and replace those values with NaNs.
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How to count items in a Go map?
If I want to count the items in the map structure, what statement should I use?
I tried to use
1 Answer
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How to count TRUE values in a logical vector
In R, what is the most efficient/idiomatic way to count the number of TRUE values in a logical vector? I can think of two ways:
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What are all the user accounts for IIS/ASP.NET and how do they differ?
Under Windows Server 2008 with ASP.NET 4.0 installed there is a whole slew of related user accounts, and I can't understand which one is which, how to they differ, and which one is REALLY the one that my app runs under. Here's a list:
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What is the purpose of a plus symbol before a variable?
this really sounds like a simple question but I had no luck searching. what does the +d in
3 Answers
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Create dynamic URLs in Flask with url_for()
Half of my Flask routes requires a variable say, /<variable>/add or /<variable>/remove . How do I create links to those locations?
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Referencing system.management.automation.dll in Visual Studio
I am beginning to look into the PowerShell model and snap-in development. The first thing I notice is to reference System.management.automation.dll. However in Visual Studio, the .NET tab does not have that assembly, and nor is one able browse to
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