August 2016 1HaskellADay Problems and Solutions

August 2016

• August 31st, 2016: Today's #haskell problem we prepare Merkle trees (used by #blockchain/#Bitcoin) by hashing data, then hashing hashes. Wow! That was a lot of hash...ing! SHA256 #crypto #Bitcoin #blockchain used for today's #haskell solution  
• August 30th, 2016: In today's #haskell exercise we look at #bitcoin mining machines comparing cost, efficiency and potential BTC found. Today's #haskell solution compares #bitcoin mining hardware ... by deriving a theorem of logic. Yeah. So: that. 
• August 29th, 2016: For today's #haskell problem we find the next number in a series. Then @JMVarnerBooks asks for an efficient encoding. A little bit of group, a little bit of compress, and we have today's #haskell solution. YES!
  
• August 26th, 2016: Today's #haskell problem continues with currencies, looking at gold, then comparing #bitcoin
  
  Today's #haskell solution 
looks at gold then compares to #bitcoin and generalizes recursion 

  

August 25th, 2016: Today's #haskell exercise looks at historical prices of #bitcoin. 

Today's #haskell solution is worth $180k ... five years ago. I wonder what it will be worth 5 years hence? 

 

August 23rd, 2016: Enough diving into the node's data, let's look at the structure of the related nodes for today's #haskell problem. The structure of tweets and related data for today's #haskell solution 

August 22nd, 2016: Today's #haskell problem is parsing twitter hashtags and a bit of data fingerprinting/exploration of same. BOOM! Today's #haskell solution analyzes hashtags twitter-users ('tweeps') use

August 19th, 2016: For today's #haskell exercise we look at unique users in a set of twitter graph-JSON. Today's #haskell solution gives us a list of users, then their tweets, from twitter graph-JSON data 

August 18th, 2016: For today's #haskell problem we extract and reify URLs from twitter graph-JSON. Today's #haskell solution extract URLs from twitter data as easily as looking up the URLs in a JSON map.

August 17th, 2016: For today's #haskell problem we explore the relationships from and to tweets and their related data. Today's #haskell solution relates data to tweets extracted from graph-JSON 

August 16th, 2016: For today's #haskell exercise we begin converting nodes in a graph to more specific types (Tweets are up first). We create some JSON Value-extractors and with those find the tweets in graph JSON in today's #Haskell solution 

August 15th, 2016: Today's #haskell exercise looks at twitter data as labeled/typed nodes and relations in JSON  

Okay! For today's #haskell solution we discover our node and relation types in twitter data-as-graphs JSON! 

August 10th, 2016: Today's #Haskell problem we look at the big data-problem: getting a grasp of large indices of tweets in graph JSON. Today's #Haskell solution time-stamps and gives 'small-data' indices to tweets from graph JSON 

August 9th, 2016: For today's #haskell problem we extract the tweets from rows of graph data encoded in JSON. Today's #Haskell solution extracts the tweets from graph JSON and does some simple queries. 

August 8th, 2016: For today's #haskell problem we look at reading in the graph of a twitter-feed as JSON and just a bit of parsing. We leverage the Cypher library for today's #haskell solution to look at 100 rows of tweets encoded as JSON 

August 5th, 2016: Today's #Haskell problem we go for the Big Kahuna: solving a Kakuro puzzle! 

Okay, we have a #Haskell solution ... finally ... maybe. The solver took too long, so I solved it myself faster :/ 

August 4th, 2016: Today's #Haskell exercise looks at (simple) constraints of unknown values for a sum-solver. Today's #Haskell solution also uses QBits to solve constrained unknowns 

August 3rd, 2016: Today's #haskell problem provides the cheatsheet: "What are the unique 4-number sums to 27?" We round-trip the Set category for today's #haskell solution

August 2nd, 2016: Today's #haskell exercise looks at solving our sums when we know some of the numbers already. QBits actually work nicely for today's #Haskell solution 

August 1st, 2016: For today's #Haskell exercise we play the 'Numbers Game.' The #haskell solution is a guarded combine >>= permute in the [Int]-domain. I like the Kleisli category; ICYMI.