The `filtermap` functional below allows to perform the standard `map` and `filter` operations in one go. The mapping function has to return a `Maybe` monad, and values of `Nothing` are filtered out.
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Category Archives: Haskell
(Haskell) Simultaneous filter and map
Posted in Haskell Tagged development, filter, functional programming, haskell, map, programming Leave a comment
(Haskell) Haskell 99 Problems, numbers 1 through 9
I had originally started these problems from #10 (Run-length encoding). I went back and did 1-8 for completeness.
Posted in Haskell Tagged 99 problems, development, haskell, programming, run length encoding Leave a comment
(Haskell) Run-Length Encoding in Haskell
Problem 10 of the famous 99 Problems. I got 99 problems, but a Lisp ain’t one.
Posted in Haskell Tagged development, Encoding, haskell, haskell run, Problems, programming, run length encoding Leave a comment
(Haskell) Reverse map
`pam` is some sort of reverse `map` (hence the name). While `map` applies a function to a list of arguments, `pam` applies a list of functions to the same argument.
(Haskell) Compare Binary Search Trees
Posted in Haskell Tagged Binary, development, haskell, programming, search, search trees Leave a comment
(Haskell) Recursive type representation in type level
Posted in Haskell Tagged development, haskell, level, programming, Recursive, recursive type Leave a comment
(Haskell) Simple Broadcatcher
HSH is a cool haskell library that allows you to leverage your shell scripting prowess in haskell programs. In this simple broadcatcher, I use curl for http get, and other standard unix tools for tracking history (so we don’t get the same file twice). The feed parsing and filtering is done in haskell using the [...]
Posted in Haskell Tagged development, haskell library, haskell programs, programming, Simple, Text Leave a comment
(Haskell) Interval of integral points
These functions return all points (pairs or triples of coordinates) within a given rectangle or box. “pam“ is the reverse map function which was defined [here](http://snipplr.com/view/18351/reverse-map/).
Posted in Haskell Tagged development, haskell, integral points, Interval, programming, rectangle Leave a comment