https://uphie.studio/posts/Go%E4%B8%AD%E5%AF%B9%E4%B8%80%E4%B8%AAslice%E4%B8%80%E8%BE%B9%E9%81%8D%E5%8E%86%E4%B8%80%E8%BE%B9append%E8%83%BD%E5%90%A6%E6%97%A0%E9%99%90%E5%BE%AA%E7%8E%AF/