it is said that Internet developers try to not to use foreign keys , so what does the here mean by not using foreign keys ? 1. The meaning here is clear: No foreign key constraints . For example, when deleting data in one table, if you want to casc...
leftEle.addEventListener( scroll , (e) =>{ rightEle.scrollTop= e.target.scrollTop }) rightEle.addEventListener( scroll , (e)=> { leftEle.scrollTop= e.target.scrollTop }) causes the mouse ...
< H1 > problem description < H1 > I use the hash table to represent the people on the seat (key represents the seat position, value is the specific uid), and then use hsetnx to process the concurrent seat. but there is a problem that, after the seat ...
1. What is the use of chunks ? initial async all 2 . minChunks reactminChunks1 3. maxInitialRequests and maxAsyncRequests don t understand what it means, and there are no examples to refer to . ...
problem description Mini Program, who crawled the information of NetEase s playlist, learned from Baidu that the API of NetEyun s playlist is http: music.163.com api play., so he started to use requests s get method to get its content. However, ...
< H2 > problem description < H2 > when traversing a set of data obtained from PHP in a HTML tag, the pseudo element added to the tag becomes invalid . I added nth-child (1):: after & first-child::after ) to show only the first one in the reference ...