question background is now writing a firewall project based on Linux netfilter . There are some questions about the interaction between kernel and user mode programs . Program environment centos7(3.10) gcc 4.8.5 20150623 (Red Hat 4.8.5-16) (G...
the editor is an error message when vscode, uses v-for. I know it s actually fine and works normally, but it s really uncomfortable to see the error report! <div v-for="item in recommends" > <a :href=&...
for example, if you bind an input value in both directions, is it too low-end to bind only through the onChange event? ...
now it looks like this: : read the document but did not find how to solve this problem, ask for help. ...
suppose there is a compound index index_abcd, and the query statement where a = " " and b = " " and c > " " and d = " " at this time c > " " is invalid. How to optimize ?...
opens a page that has no focus and must be clicked to get focus. how to open a from page and get focus automatically ...