left-recursion

Headers Including Each Other in C++

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I’m a C++ newbie, but I wasn’t able to find the answer to this (most likely trivial) question online. I am having some trouble compiling some code where two classes include each other. To begin, should my #include statements go inside or outside of my macros? In practice, this hasn’t seemed to matter. However, in … Read more

Does CUDA support recursion?

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Does CUDA support recursion? Answer It does on NVIDIA hardware supporting compute capability 2.0 and CUDA 3.1: New language features added to CUDA C / C++ include: Support for function pointers and recursion make it easier to port many existing algorithms to Fermi GPUs http://developer.nvidia.com/object/cuda_3_1_downloads.html Function pointers: http://developer.download.nvidia.com/compute/cuda/sdk/website/CUDA_Advanced_Topics.html#FunctionPointers Recursion: I can’t find a code sample … Read more

Can an anonymous method in C# call itself?

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I have the following code: class myClass { private delegate string myDelegate(Object bj); protected void method() { myDelegate build = delegate(Object bj) { var letters= string.Empty; if (someCondition) return build(some_obj); //This line seems to choke the compiler else string.Empty; }; …… } } Is there another way to set up an anonymous method in C# … Read more

Method to get all files within folder and subfolders that will return a list

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I have a method that will iterate through a folder and all of its subfolders and get a list of the file paths. However, I could only figure out how to create it and add the files to a public List, but not how to return the list. Here’s the method: public List<String> files = … Read more

Infinite loop in constructor without for or while

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I did a test here, but the output is a loop without ending, I don’t know why. Actually, I am doing another test, but when I wrote this, I don’t understand how the loop occurred. It is output “ABC” repeatedly. #include <map> #include <string> #include <iostream> class test { public: std::map <int, int> _b; test(); … Read more

How do I replace while loops with a functional programming alternative without tail call optimization?

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I am experimenting with a more functional style in my JavaScript; therefore, I have replaced for loops with utility functions such as map and reduce. However, I have not found a functional replacement for while loops since tail call optimization is generally not available for JavaScript. (From what I understand ES6 prevents tail calls from … Read more

Defining and calling function in one step

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Is there a way in Javascript to define a function and immediately call it, in a way that allows it to be reused? I know you can do one-off anonymous functions: (function(i) { var product = i * i; console.log(product); // Can’t recurse here because there’s no (ECMA standard) way for the // function to … Read more

Why should recursion be preferred over iteration?

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Iteration is more performant than recursion, right? Then why do some people opine that recursion is better (more elegant, in their words) than iteration? I really don’t see why some languages like Haskell do not allow iteration and encourage recursion? Isn’t that absurd to encourage something that has bad performance (and that too when more … Read more