1 reassemble two arrays using double loops 2 condition 1. Compare the two arrays of Arr1,Arr2 and return a new array resultArr 2. ResultArr contains all the items in Arr2 3. If the project id in resultArr exists in Arr1 and its lev...
The timeline. of chrome console is given below . By the way, no matter it is normal refresh, hard refresh or empty cache hard refresh, there will be no white pages. before refresh: : : : HTTP: : ...
problem description restful development mode, however, when the front end gets the data sent from the server, many of them do not give default values, and many of them are caused by null, such as the string .toString (), length, and so on. if each fi...
now there is an old list page on the mobile side, as shown in the following figure: there is a child list under it. When the user clicks on the parent list item, the front end will request the backend to return the child list under this category, an...