February 2019 1HaskellADay Problems and Solutions

• February 20th, 2019: Wednesday's #haskell problem: we've got words, now let's find words that start with ... 'x'. 
• February 19th, 2019: Tuesday's #haskell problem: now that we have a word finder, let's pretty-print the results! 
• February 18th, 2019: Monday's #haskell problem is to come up with sets of wordsusing only a set of supplied letters. Monday's #haskell solution has some trickiness around empty sets: this, we call 'fun.' 

April/May 2019 1HaskellADay 1Liners

• May 27th, 2018:
  data F = F { a, b, c :: String }
  data Stamped a = { time :: Day, stamped :: a }
  
  f :: Stamped F -> String
  
  output of f x is  "time a b c" for the respective values of time, a, b, c
  
  Is there some monadic / applicative elegant definition that does this?
• Nickolay Kudasov @crazy_fizruk
  f = intercalate “ “ . sequence [ show.time, a.stamped, b.stamped, c.stamped ]
• Nickolay Kudasov @crazy_fizruk
  f = intercalate " " <$> http://pure.show .time <> (sequence [a, b, c]).stamped
  A bit trickier, but shorter and uses stamped once.
• April 13th, 2018: given f :: [a] -> b -> [c]
  where c is a derived from g :: a -> b -> c
  
  You have [a] and [b]
  
  Write a function h :: [a] -> [b] -> [c] from f

January 2019 1HaskellADay Problems and Solutions

• January 30th, 2019: Wednesday's #haskell problem is to take the JSON-y articles and the HTML-encoded articles and sort them by id and by date. 
• January 29th, 2019: For Tuesday's #haskell problem we convert JSON-like strings to valid HTML strings, handling irregularities (gracefully!) in the input data as we go. For Tuesday's #haskell solution we convert text to text when you're not sure of the structure a priori. 
• January 28th, 2019: Hello, Haskellers! Happy New Year! Monday's #haskell problem is a little warming-up JSON parsing exercise to get back into the swing of things. Monday's #haskell solution uses the Data.Aeson library to parse the JSON into Haskell data structures. 

December 2018 1HaskellADay Problems and Solutions

• December 19th, 2018: Tuesday's #haskell problem was to eliminate that pesky plus-sign; Wednesday's haskell problem is to enputify it back in! A solution of enputification.
• December 18th, 2018: Tuesday's #haskell problem is to sum a set of integers from file ... except the integers are stored with a novel representation. Tuesday's #haskell solution eliminates that pesky plus-sign, and, doing that, you get yourself a gold star from the adventofcode.com  
  
• December 5th, 2018: Wednesday's #haskell problem: from KAYAK to ULULU, generalizing the palindrome-grid puzzle. Wednesday's #haskell solution: ULULU, RADAR, or any word you want can be engridified (that's a word, now) 
  
• December 4th, 2018: Tuesday's #haskell problem is to find 5-letter palindromes in your word dictionary. Tuesday's #haskell solutions finds 'ULULU'! Now, that's another KAYAKescque word! 
• December 3rd, 2018: Monday's #haskell problem is scanning a sea of A's, K's, and Y's for a KAYAK.  Monday's #haskell solution is a kayak found, now that I remember where I placed it.