Per Vognsen suggests a Haskell version of the damage function from my Schematic Tables talk:<\/p>\n
\r\ndata Attack = Magic | Melee\r\nhit surprise defense attack = damage\r\n where effectiveness = power * (if surprise then 3 else 2)\r\n (power, damage) = case attack of\r\n Magic -> (5, max 0 (effectiveness - defense))\r\n Melee -> (4, 2 * effectiveness \/ defense)\r\n<\/pre>\nThis passes pairs of values (power, damage) through conditionals. That allows the conditionals to multiplex more than one value, rather than being repeated. I suspect I could stymie that approach with more complex data flows, but I am happy to acknowledge that Haskell does OK on this example. Thanks, Per.<\/p>\n","protected":false},"excerpt":{"rendered":"
Per Vognsen suggests a Haskell version of the damage function from my Schematic Tables talk: data Attack = Magic | Melee hit surprise defense attack = damage where effectiveness = power * (if surprise then 3 else 2) (power, damage) = case attack of Magic -> (5, max 0 (effectiveness – defense)) Melee -> (4, … <\/p>\n