This is because that set of types can just be repeated to achieve as low a susceptance as desired" ( defn immortal? "A type combo is immortal if it is resistant or invulnerable to every pokemon type. ( set ( map ( comp vec sort ( partial into type)) (multitypes 1))))) ( defn type-successors "Return the set of types that can be made by appending a single type to the given combination." ( def type-compare "compare two type combinations W.R.T. Now that we have a basic best-first-search, it's convenient to write aįew pokémon-type specific convenience functions. Step ( partial best-first-step successors)] Initial-visited-nodes ( sorted-set-by comparator) ( apply ( partial sorted-set-by comparator) initial-nodes) Returns a lazy sequence of search results, which terminates when there are no remaining unvisited positions." Comparator defines which positions are more promising, successors produces a list of improved positions from the given position (if any exist), and initial-nodes is a list of starting positions. ( defn best-first-search "Searches through a network of alternatives, pursuing initially-promising positions first. memoize partial from core so that for example (= (partial + 1) (partial + 1)) this way, best first search can take advantage of the memoization of best-first step ( alter-var-root #'best-first-step memoize) ( union unvisited ( set (successors best-node))) LOWER values of the function are preferred ( cond if the function cannot differentiate the two values then compare the two values using re/compare
Objects with the same fn-value are further compared by re/compare." Objects are sorted in increasing numerical order. ( defn comparatize "Define a comparator which uses the numerical outputs of fn as its criterion.
\(\fracĭefense-strengths is a more convenient form of pokemon-gen-two, The susceptibility of Water types against Water attacks is.Is doubled when it is used against a Fire type pokémon. The damage that a Water type attack normally does Is 2, because Water type attacks are strong against Fire type The susceptibility of Fire types against Water attacks.The damage thatĪ Ground type attack normally does is multiplied by 0 when it is The susceptibility of Flying types against Ground is 0, because GroundĪttacks cannot hurt Flying pokémon at all.Susceptibility, and no susceptibility (immunity). High susceptibility, average susceptibility, particularly low In the Pokémon games, only four susceptibility values (two, The type in the row is against a Pokémon of the type in theĬolumn. System the number in each cell indicates how effective an attack of Relative strengths of each of the types in the Pokémon type Steel) that interact like an extended version of Rock-Paper-Scissors:įor example, the Fire type is strong against the Grass type but weakĪgainst the Water type. Types (Rock, Grass, Ice, Psychic, Ground, Bug, Flying, Fire,įighting, Dark, Dragon, Poison, Water, Ghost, Normal, Electric, and The Pokémon type system consists of seventeen different
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