Have got a dictionary of words

cmd/prep-words/main.go

@@ -0,0 +1,72 @@
+package main
+
+import (
+	"bufio"
+	"encoding/json"
+	"flag"
+	"log"
+	"os"
+	"sort"
+)
+
+type wordList struct {
+	Words map[int][]string `json:"words"`
+}
+
+func main() {
+	dictFile := flag.String("dict", "", "dictionary of word to prep")
+	flag.Parse()
+
+	words := wordList{
+		Words: make(map[int][]string),
+	}
+
+	if err := scanSuitableWords(*dictFile, func(word string) {
+		if len(word) >= 4 && len(word) <= 6 {
+			words.Words[len(word)] = append(words.Words[len(word)], word)
+		}
+	}); err != nil {
+		log.Fatal(err)
+	}
+
+	for _, word := range words.Words {
+		sort.Strings(word)
+	}
+
+	if err := json.NewEncoder(os.Stdout).Encode(words); err != nil {
+		log.Fatal(err)
+	}
+}
+
+func scanSuitableWords(dictFile string, withWord func(word string)) error {
+	f, err := os.Open(dictFile)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	scanner := bufio.NewScanner(f)
+	for scanner.Scan() {
+		isSuitable := true
+		breakpoint := len(scanner.Text())
+
+		for i, r := range scanner.Text() {
+			if r == '/' {
+				breakpoint = i
+				break
+			}
+
+			if r < 'a' || r > 'z' {
+				isSuitable = false
+				break
+			}
+		}
+
+		if isSuitable {
+			word := scanner.Text()[:breakpoint]
+			withWord(word)
+		} else {
+		}
+	}
+	return scanner.Err()
+}