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solver.go
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solver.go
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package main
import (
"math"
"regexp"
"sort"
"strings"
)
type ScoredWord struct {
word string
score int
}
type State struct {
knownLetters string
candidates []string
}
var (
CharToRating = map[rune]int{
'a': 52,
'e': 48,
's': 41,
'o': 32,
'r': 31,
'i': 30,
'l': 26,
't': 25,
'n': 25,
'u': 21,
'd': 17,
'c': 16,
'y': 15,
'm': 15,
'p': 14,
'h': 14,
'b': 13,
'g': 12,
'k': 11,
'f': 8,
'w': 7,
'v': 6,
'z': 3,
'j': 2,
'x': 2,
'q': 1,
}
)
func newState(size int) State {
var result = State{knownLetters: "", candidates: []string{}}
for i := 0; i < size; i++ {
result.candidates = append(result.candidates, "abcdefghijklmnopqrstuvwxyz")
}
return result
}
func (s State) String() string {
result := "{knownLetters: " + s.knownLetters + ", candidates: ["
for i, c := range s.candidates {
if i > 0 {
result += ", "
}
result += c
}
return result + "]}"
}
func (s State) Clone() State {
var result = newState(len(s.candidates))
result.knownLetters = s.knownLetters
copy(result.candidates, s.candidates)
return result
}
func (s State) Regex() string {
var result = "^"
for _, c := range s.candidates {
result += "[" + c + "]"
}
return result + "$"
}
func (s State) Grep(wordsFile string) string {
var result = "grep '" + s.Regex() + "' " + wordsFile
for _, c := range s.knownLetters {
result += " | grep " + string(c)
}
return result
}
func (s State) Next(guess string, outcome string) State {
var result = s.Clone()
if len(guess) != len(s.candidates) {
panic("guess and state must have same length")
}
if len(guess) != len(outcome) {
panic("guess and outcome must have same length")
}
for i, o := range outcome {
if o == 'x' {
for j, candy := range result.candidates {
if len(candy) > 1 {
result.candidates[j] = strings.Replace(candy, string(guess[i]), "", -1)
}
}
} else if o == 'c' {
if strings.IndexByte(result.knownLetters, guess[i]) == -1 {
result.knownLetters += string(guess[i])
}
result.candidates[i] = string(guess[i])
} else if o == 'e' {
if strings.IndexByte(result.knownLetters, guess[i]) == -1 {
result.knownLetters += string(guess[i])
}
result.candidates[i] = strings.Replace(result.candidates[i], string(guess[i]), "", -1)
} else {
panic("unknown outcome: " + string(o))
}
}
return result
}
func uniqueChars(str string) []rune {
seen := make(map[rune]bool)
var unique []rune
for _, char := range str {
if !seen[char] {
seen[char] = true
unique = append(unique, char)
}
}
return unique
}
func lettersContained(letters, word string) bool {
for _, letter := range letters {
if !strings.ContainsRune(word, letter) {
return false
}
}
return true
}
func scoreWord(word string) int {
unique := uniqueChars(word)
result := 1_000 * len(unique)
for _, ch := range unique {
result += CharToRating[ch]
}
return result
}
func (s State) ScoreWords(words []string) []ScoredWord {
var result []ScoredWord
regex := regexp.MustCompile(s.Regex())
for _, word := range words {
if regex.MatchString(word) && lettersContained(s.knownLetters, word) {
result = append(result, ScoredWord{word, scoreWord(word)})
}
}
sort.Slice(result, func(i, j int) bool {
return result[i].score > result[j].score
})
return result
}
func Tabulate(scored []ScoredWord, width, height int) string {
total := int(math.Min(float64(width*height), float64(len(scored)))) // stupid go
lines := make(map[int]string)
for i := 0; i < total; i++ {
lines[i%height] += scored[i].word + " "
}
result := ""
for i := 0; i < height; i++ {
if line := lines[i]; line != "" {
result += strings.TrimSpace(lines[i]) + "\n"
}
}
return result
}