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theburningmonk
/ ndclondon2014_fp_track
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August 29, 2015 14:12
— forked from swlaschin/ndclondon2014_fp_track.md
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| ## Functional Track talks from NDC London 2014 | |
| ### Wednesday 2014-12-3 | |
| * [F-Words - Functional Programming Terms With More Than Four Letters - Calvin Bottoms](http://www.ndcvideos.com/#/app/video/2191) | |
| * [Reactive Game Development For The Discerning Hipster - Bodil Stokke](http://www.ndcvideos.com/#/app/video/2221) | |
| * [Erlang Patterns Matching Business Needs -- Torben Hoffman](http://www.ndcvideos.com/#/app/video/2211) | |
| * [Equivalence Classes, xUnit.net, FsCheck, Property-Based Testing -- Mark Seemann](http://www.ndcvideos.com/#/app/video/2291) | |
| * [Functional programming design patterns -- Scott Wlaschin](http://www.ndcvideos.com/#/app/video/2311) | |
| * [Write Your Own Compiler in 24 Hours -- Phillip Trelford](http://www.ndcvideos.com/#/app/video/2281) |
theburningmonk
/ fsharp.fs
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August 29, 2015 14:05
— forked from neotrinity/hash_folds.hs
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| open System | |
| let letters = "acdegilmnoprstuw" | |
| let hash : string -> int64 = Seq.fold (fun acc ch -> acc * 37L + int64 (Seq.findIndex ((=) ch) letters)) 7L | |
| let unhash : int64 -> string = | |
| Seq.unfold (function | |
| | n when n <= 7L -> None | |
| | n -> let idx = n % 37L |> int | |
| (letters.[idx], n / 37L) |> Some) | |
| >> (fun chars -> new String(chars |> Seq.toArray |> Array.rev)) |