Though there are diverse tools for Haskell development many are not widely advertised; here I collect those I use.
ATS is known for its sophisticated type system, but it also has a template system that has been the focus of recent work. Rather than going into technical details or comparing templates to other forms of generic programming, I wanted to give an example.
Suppose we want to count the number of lines in a file. Rust has a crate that would seem to help us, namely, bytecount.
The canonical way to get a perceptual hash is using the pHash library. In fact, we can get nearly the same performance in Haskell using hip and repa.
Here I'd like to show an example of runtime complexity, arising from a practical problem.
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