Initial check-in

anagram/anagram.go

@@ -0,0 +1,40 @@
+package anagram
+
+import (
+	"bufio"
+	"io"
+	"sort"
+
+	"github.com/ray1729/puzzle-solver/util"
+)
+
+type DB interface {
+	FindAnagrams(s string) []string
+}
+
+func toKey(s string) string {
+	xs := util.LowerCaseAlpha(s)
+	sort.Slice(xs, func(i, j int) bool { return xs[i] < xs[j] })
+	return string(xs)
+}
+
+type HashDBImpl map[string][]string
+
+func Load(r io.Reader) (DB, error) {
+	db := make(HashDBImpl)
+	sc := bufio.NewScanner(r)
+	for sc.Scan() {
+		s := sc.Text()
+		k := toKey(s)
+		db[k] = append(db[k], s)
+
+	}
+	if err := sc.Err(); err != nil {
+		return nil, err
+	}
+	return db, nil
+}
+
+func (d HashDBImpl) FindAnagrams(s string) []string {
+	return d[toKey(s)]
+}