currying

I'm a c++ developer having used signals & slots in c++ which to me seems to be analogous to delegates in c#. I've found myself at a loss in searching for the functionality provided by "bind", and feel I must be missing something. I feel like that something like the following, which is possible in c++ should be possible in c# with delegates. Here is some psudo-code for what I would do in c++: Slot<void> someCallback; int foo(int i) { std::cout << "Value: " << i << "\n"; return i; } int main() { int i = 0; Slot<int> someCallback = bind( fun_ptr(foo), i ); ++i; // added to show that late

The uncurry function only works for functions taking two arguments: uncurry :: (a -> b -> c) -> (a, b) -> c If I want to uncurry functions with an arbitrary number of arguments, I could just write separate functions: uncurry2 f (a, b) = f a b uncurry3 f (a, b, c) = f a b c uncurry4 f (a, b, c, d) = f a b c d uncurry5 f (a, b, c, d, e) = f a b c d e But this gets tedious quickly. Is there any way to generalize this, so I only have to write one function? Try uncurryN from the tuple package. Like all forms of overloading, it's implemented using type classes. In this case by manually spelling out

In Python, I'd like to write a function make_cylinder_volume(r) which returns another function. That returned function should be callable with a parameter h , and return the volume of a cylinder with height h and radius r . I know how to return values from functions in Python, but how do I return another function ? Try this, using Python: import math def make_cylinder_volume_func(r): def volume(h): return math.pi * r * r * h return volume Use it like this, for example with radius=10 and height=5 : volume_radius_10 = make_cylinder_volume_func(10) volume_radius_10(5) => 1570.7963267948967 Notice

This question already has an answer here: Why can't C# infer type from this seemingly simple, obvious case 5 answers I'm working with a function that takes two functions as parameters, and returns a new composed one: public static Action<T> Compose<T>(Action<T> first, Action second) { return new Action<T>(arg => { first(arg); second(); }); } I've noticed that the compiler complains if I don't specify T , when sending it a static or member function (as opposed to an actual Action<T> object): static void Main(string[] args) { // compiler error here var composed = Compose(Test, () => Console

We do some dynamic creation of parallel steps in some of our jobs. Thanks to this thread I found how to dynamically create the map with parameters for use in the parallel step. However now I wanted to reuse parts of the code which is used to create those parallel steps. For this I feel that I would need to curry the closures. However currying seems not to work correctly. Referencing the loop variable (valueCopy) inside the closure does the right thing ( as mentioned here ) but currying does not do what I would expect. Am I doing something wrong, is this just not (yet) supported, are there any