dooonabe
dooonabe
> 对啊，所以才需要双重检查 ‘ 双重检查存在的一样在于可能会有多个线程进入第一个判断，然后竞争同步锁，线程A得到了同步锁，创建了一个Singleton实例，赋值给instance，然后释放同步锁，此时线程B获得同步锁，又会创建一个Singleton实例，造成初始化覆盖。 ’ 这句注释不对。
redis cluster not clustor
贴一下回答的上下文 
@JsBergbau i get three android phones: redmi4(android6.0), redmi6(android8.0),samsung s10(android12),only android6.0 can fix the gps, others can view the satellites but can't fix them.
> @JsBergbau i get three android phones: redmi4(android6.0), redmi6(android8.0),samsung s10(android12),only android6.0 can fix the gps, others can view the satellites but can't fix them. Wow! Recently ,I test on redmi6(android8.0)...
确实，windows10 chrome/edge 下也是这样的情况，用的最新版本的js
  change these codes can support percentage value in temporary situation