Thursday, April 30, 2015

April 2015 1HaskellADay Problems and Solutions

April 2015
  • April 30th, 2015: "SHOW ME DA MONAY!" for today's #haskell problem 
    Simple? Sure! Solution? Yes.
  • April 29th, 2015: We take stock of the Stochastic Oscillator for today's #haskell problem #trading We are so partially stoched for a partial solution for the Stochastic Oscillator 
  • April 28th, 2015: Today's #haskell puzzle as a ken-ken solver a solution (beyond my ... ken) is defined at
  • April 27th, 2015: Rainy days and Mondays do not stop the mail, nor today's #haskell problem! The solution posted at … shows us view-patterns and how to spell the word 'intercalate'.
  • April 24th, 2015: Bidirectionally (map) yours! for today's #haskell problem A solution to this problem is posted at 
  • April 23rd, 2015: Today's #haskell problem looks impossible! So this looks like this is a job for ... KIM POSSIBLE! YAY! @sheshanaag offers a solution at .
  • April 22nd, 2015: "I need tea." #BritishProblems "I need clean data" #EveryonesPipeDream "Deletia" today's #haskell problem Deletia solution? Solution deleted? Here ya go!
  • April 21st, 2015: In which we learn about Tag-categories, and then Levenshtein distances between them for today's #haskell problem Okay, wait: is it a group of categories or a category of groups? me confused! A solution to today's #haskell at
  • April 20th, 2015: Today we can't see the forest for the trees, so let's change that A solution to our first day in the tag-forest ... make sure you're marking your trail with breadcrumbs!
  • April 17th, 2015: No. Wait. You wanted line breaks with that, too? Well, why didn't you say so in the first place? Have some curry with a line-breaky solution at
  • April 16th, 2015: "more then." #okaythen Sry, not sry, but here's today's #haskell problem: I can't even. lolz. rofl. lmao. whatevs. And a big-ole-blob-o-words is given as the solution for today's #haskell problem. It ain't pretty, but... there it is
  • April 15th, 2015: Poseidon's trident or Andrew's Pitchfork analysis, if you prefer, for today's #haskell problem
  • April 14th, 2015: Refining the SMA-trend-ride for today's #haskell problem. Trending and throttling doesn't ... quite get us there, but ... solution:
  • April 13th, 2015: In today's #haskell problem we learn zombies are comonadic, and like eating SMA-brains. Yeah. That. Hold the zombies, please! (Or: when $40k net profit is not enough by half!)
  • April 10th, 2015: Today's #haskell problem delivered with much GRAVITAS, boils down to: don't be a dumb@$$ when investing #KeepinItReal The SMA-advisor is REALLY chatty, but how good is it? TBD, but here's a very simple advisor: Backtesting for this strategy is posted at (or: how a not so good buy/sell strategy give you not so good results!)
  • April 9th, 2015: A bit of analysis of historical stock data for today's #haskell problem A solution to the SMA-analyses part is posted at 
  • April 8th, 2015: MOAR! MOAR! You clamor for MOAR real-world #haskell problems, and how can I say no? Downloading stock screens Hint: get the screens from a web service; look at, e.g.: A 'foldrM'-solution to this problem is posted at
  • April 7th, 2015: Looking at a bit of real-world #haskell for today's stock (kinda-)screen-scraping problem at Hint: perhaps you'd like to solve this problem using tagsoup? *GASP* You mean ... it actually ... works? A MonadWriter-y tagsoup-y Monoidial-MultiMap-y solution
  • April 6th, 2015: What do three men teaching all of high school make, beside today's #haskell problem? Tired men, of course! Thanks, George Boole! Three Men and a High School, SOLVED!
  • April 3rd, 2015: reverseR that list like a Viking! Rrrrr! for today's problem … #haskell Totes cheated to get you the solution used a library that I wrote, so, like, yeah, totes cheated! ;)
  • April 2nd, 2015: We're breaking new ground for today's #haskell problem: let's reverse lists... relationally. And tag-type some values After several fits and starts @geophf learns how to reverse a list... relationally and can count to the nr 5, as well
  • April 1st, 2015: Take a drink of today's #haskell problem: love potion nr9 because, after all: all we need is love, la-di-dah-di-da! A solution can be found au shaque d'amour posted at

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