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Questions tagged [fold]

Reducing a sequence of terms to a single term.

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1 vote
1 answer

Build a fixed-length vector from a recursive factory function

I need a function of type forall (n :: Nat). RandomGen q => q -> Vec n q. Obviously this is possible to do (correctly, don't just ...
5 votes
1 answer

fold expressions using a function recursively

I have written an accumulate function similar to std::accumulate that works on a std::array. The goal is to remove the loop using fold expressions. This code currently works in c++17: ...
1 vote
1 answer

Implementations of unzip in Racket

I've been practicing my folds and tail-call recursive programming, and I wanted to work on unzip for the general case as opposed to just pairs. This was very easy ...