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...
as shown in the picture, yellow is a large page, and red is a component that introduces (components), and wraps the red component with from tags. Now I want to use the button of the red component to trigger a yellow from submission event. Is that okay? ...
how to use the environment variables on the linux service in the configuration file, ...
requirements: Code: const fs = require("fs"); function combine(file1,file2) { var size = 0; fs.stat(file1,function (err,stat) { if(stat.isFile()){ size = stat.size; console.log(size); ...
use angular-cli to build the project, because cli itself does not provide hot updates. Refer to tutorial and follow the tutorial steps to report errors all the time. The errors are as follows . Schema validation failed with the following errors: Dat...
Hello, how do I implement https: bl.ocks.org mbostock . with a shader, which is also controlled by 4 contacts. this problem is aimed at the Objective-C language environment on the iOS platform. I want to assign it directly through the CATransform3D...