how to use JavaScript to calculate the coordinates of x2 and y2 after the elements in the figure are rotated? the center point of rotation is the center point of dashed wireframe ...
After canvas inserts a picture, operations such as rotation and magnification need to be carried out, and the track will be recorded by hand on the basis of the operation. The problem is that the rotation and magnification operation will change the ori...
db.categoryGoods.aggregate ([{$match: {categoryId:2841} ) ,{$lookup:{from:"goods",localField:"goodsId",foreignField:"_id",as:"goods"}} ,{$project:{_id:0,goods:1}} ...
There is under c3p0config.properties. jdbcUrl = "jdbc:mysql: localhost:3306 myproject1_simplesite" driverClass = "com.mysql.jdbc.Driver" user = "root" password = "root" use javaconfig to configure Dao explicitl...
VSCode how do I open the front-end file ( html file) in server mode? For example, there is a A.html file under the project. If you want to operate directly in VSCode , you can access it in the browser in the form of http: localhost xxx xx xx A.ht...
using nginx to deploy vue projects has been reporting errors all the time, which has been bothering me for several days. Does any god know why? here is my nginx configuration: import Vue from vue import Router from vue-router import HelloWorld...
Today I encountered a very strange problem with vue: I. sync bound a prop: : is-amazon.sync= "isAmazon " , then passed a value to the parent component with $emit in the child component: this.$emit ( update:is-amazon ,val) , found that the isAmazo...