my question is that I now have three sentences case1 = u to deal with the management in front of the shop in Li Village case2 = u Licun River Patrol case3 = I am doing river management work by the Licun River to compare these three sentences ...
interface Person { firstName: string; lastName: string; } function greeter(person: Person) { return "Hello, " + person.firstName + " " + person.lastName; } let user = { firstName: "Jane", lastName: "User" }...
Today, I submitted the JS using the AJAX that Axios writes and registers. It can send requests normally, but I find that the backend can not accept the username and password information from the frontend at all. How should I fix this BUG? Thank you. pa...
I hope to explain it in detail Why can clearTimeout (tc) clear the last setTimeout? ...
an object state={ new1:1, new2:2, new3:3, old1:1, old2:2 } what should I do if I want to loop out the value of state.new1 state.new2state.new3 do not take out old1 old2 for example, get state.new1 in the first loop and state.ne...
for example, if there is a class whose parameters are invalid when declaring, you should not successfully create an instance but return null,. How to implement it? in addition, there is another scenario. If I use Array.some to verify an array paramete...