atcoder
diff --git a/‎cache/redis.go
Copy file name to clipboardExpand all lines: cache/redis.go
+2-2Lines changed: 2 additions & 2 deletions b/‎cache/redis.go
Copy file name to clipboardExpand all lines: cache/redis.go
+2-2Lines changed: 2 additions & 2 deletions
@@ -126,10 +126,10 @@ func exists(conn redis.Conn, key string) bool {
 func (c RedisCache) Delete(key string) error {
 	conn := c.pool.Get()
 	defer conn.Close()
-	if !exists(conn, key) {
+	existed, err := redis.Bool(conn.Do("DEL", key))
+	if !existed {
 		return ErrCacheMiss
 	}
-	_, err := conn.Do("DEL", key)
 	return err
 }
Original file line number	Diff line number	Diff line change
`@@ -126,10 +126,10 @@ func exists(conn redis.Conn, key string) bool {`
`126`	`126`	`func (c RedisCache) Delete(key string) error {`
`127`	`127`	`conn := c.pool.Get()`
`128`	`128`	`defer conn.Close()`
`129`		`- if !exists(conn, key) {`
	`129`	`+ existed, err := redis.Bool(conn.Do("DEL", key))`
	`130`	`+ if !existed {`
`130`	`131`	`return ErrCacheMiss`
`131`	`132`	`}`
`132`		`- _, err := conn.Do("DEL", key)`
`133`	`133`	`return err`
`134`	`134`	`}`
`135`	`135`