1.laravel created a new resource controller class UserController extends Controller { public function index() { echo "i am index"; } public function create() { echo "i am create"; } pu...
problem description hive is stuck or has no speed while executing mapreduce read the log hadoop resourcemanager reported an error 2018-07-17 19br 17br the environmental background of the problems and what methods you have tried set up a hadoop c...
suppose that thread 1 executes wait (), thread 2 to acquire lock resources, while thread 3 starts to execute synchronized to compete for lock resources, and thread 2 uses notifyAll () to wake up thread 1 before ending, so which thread 1 or thread 3 can ...
problem description I have read a lot of articles on the Internet, and they all say that optimistic locks are generally the way to add version fields and use CAS. However, we all know that it is very troublesome to implement this solution in a project...
let joke ={ a: 1 , b: 2 , c:false } for(let key in joke){ if(joke[key]== ){ alert( ) } } as above, in the loop check, c is a Boolean value false, judgment pops up alert, ask how to ignore the case that the key-valu...
the requirement is that the page will not be refreshed every time you enter the page, such as content, but the page will be refreshed regardless of whether it is switching routes or moving forward and backward. routing configuration: mode: history ,...
although I know that this question is a little worthless, but now the js compression on the web side can not compress such a large file. Please answer my question . File: cltest.oss-cn-shanghai.aliyuncs.com lib.min.js ...
want to learn distributed preparation for job-hopping. I don t know where to start. Will zookeeper+dubbo only learn these two frameworks and ask the boss to show me the way? thank you ...