Writing, systems, and notes by Rahul Goma Phulore.https://rahul.london/en-gbhttps://rahul.london/writing/2018/08/12/composable-table-updates-in-slick/https://rahul.london/writing/2018/08/12/composable-table-updates-in-slick/Using existential types to build composable, type-safe update operations in Slick.Sun, 12 Aug 2018 00:00:00 GMThttps://rahul.london/writing/2014/08/09/types-of-map-function-in-haskell-scala/https://rahul.london/writing/2014/08/09/types-of-map-function-in-haskell-scala/A comparative look at how Haskell, Scala, and Clojure generalise `map` in different directions.Sat, 09 Aug 2014 22:08:00 GMThttps://rahul.london/writing/2014/03/16/dead-simple-threading-with-functions-in/https://rahul.london/writing/2014/03/16/dead-simple-threading-with-functions-in/A small function-based alternative to Clojure's threading macros, built from composable combinators instead of syntax transformation.Sun, 16 Mar 2014 23:14:00 GMThttps://rahul.london/writing/2014/02/09/so-how-much-of-inheritance-criticism/https://rahul.london/writing/2014/02/09/so-how-much-of-inheritance-criticism/A look at whether the fragile-base-class problem is really specific to inheritance, or whether selective overriding is the deeper issue.Sun, 09 Feb 2014 15:48:00 GMThttps://rahul.london/writing/2013/10/02/understanding-monads/https://rahul.london/writing/2013/10/02/understanding-monads/A transcript-style introduction to monads through Scala examples involving optional values, exceptions, and futures.Wed, 02 Oct 2013 09:52:00 GMThttps://rahul.london/writing/2013/09/14/not-so-embedded-documents-with-clojure/https://rahul.london/writing/2013/09/14/not-so-embedded-documents-with-clojure/Using metadata and multimethods in Clojure to get polymorphic behaviour over plain maps without wrapping them in classes.Sat, 14 Sep 2013 21:37:00 GMThttps://rahul.london/writing/2013/07/21/easing-use-of-embedded-document-pattern/https://rahul.london/writing/2013/07/21/easing-use-of-embedded-document-pattern/Using small Ruby combinators to reduce boilerplate when wrapping JSON with the Embedded Document pattern.Sun, 21 Jul 2013 19:49:00 GMThttps://rahul.london/writing/2012/11/04/something-to-be-said-for-dynamic-typing/https://rahul.london/writing/2012/11/04/something-to-be-said-for-dynamic-typing/A short note pointing to Rahul's Quora answer on what dynamic typing can make possible, especially in contrast with Scala.Sun, 04 Nov 2012 12:32:00 GMThttps://rahul.london/writing/2012/07/22/stacking-up-factor-against-lisp-bullet-list/https://rahul.london/writing/2012/07/22/stacking-up-factor-against-lisp-bullet-list/Notes from revisiting Factor, prompted by a Twitter exchange about how its macro system and broader design compare with Lisp.Sun, 22 Jul 2012 23:18:00 GMThttps://rahul.london/writing/2012/02/27/f-option-cheat-sheet/https://rahul.london/writing/2012/02/27/f-option-cheat-sheet/A compact guide to working with F# options through higher-order functions instead of repetitive pattern matching.Mon, 27 Feb 2012 17:58:00 GMThttps://rahul.london/writing/2011/12/20/sections-of/https://rahul.london/writing/2011/12/20/sections-of/A small note on learning to read Haskell expressions that use sections of `(.)`, and the explanation that finally made them click.Tue, 20 Dec 2011 20:13:00 GMThttps://rahul.london/writing/2011/10/31/10-factor-one-liners-to-impress-your-friends/https://rahul.london/writing/2011/10/31/10-factor-one-liners-to-impress-your-friends/A first pass at the classic “one-liners to impress your friends” meme, translated into Factor after discovering the language through Slava Pestov’s talk.Mon, 31 Oct 2011 22:33:00 GMThttps://rahul.london/writing/2011/08/11/emulating-cs-default-keyword-in-scala/https://rahul.london/writing/2011/08/11/emulating-cs-default-keyword-in-scala/Using Scala’s type system to emulate C#’s default keyword and then extend it with typeclass-driven defaults.Thu, 11 Aug 2011 18:16:00 GMT