you can often see the method of converting a pseudo array into a true array on the Internet; similar to let pretendArr = {0:0,1:1,2:2,length:3}; [].slice.call(pretendArr); [0,1,2] so why? Why can it be converted to a true array? I hope someone can h...
is mainly a bit of a problem with code execution, so I won t list the use of dealing with apply and call here. The code is as follows. I don t understand it from Code 2. I don t understand even if I look at the ECMAScript standard. I hope I can get a...
how does a single page reference print background log information? students who develop in the background should know that most of the time, the background log information is printed, but a single page is returned to the same index page in the backgroun...
$keyyy = null; while ($r = mysqli_fetch_array($rs)){ $tagg = array($r[ name ]); foreach ($tagg as $key) { $keyyy = $key. , ; } } the printed result is 1,2,3,4,5, just why do I only have 5, when I update to the number table? ...
as shown in the figure, how to determine that the user clicked on this X, and execute the corresponding method. ...
I would like to ask why the formal parameter of the Python function can be changed sometimes and sometimes not? Forgive me for not knowing how to describe it, so I borrowed the concept of "deep and shallow copy ". def func(x,y,l): x = y+1 l.ap...
now our project is a single-page project using vue. Each time you modify a business code, webpack will repackage all the files. It feels unrealistic. How can I do that? I modified a business code, and webpack can identify the modified files. Other unmodi...
introduce js: < script type= "text javascript " src= "bootstrap-table dist locale bootstrap-table-zh-CN.js " > < script > ^ but cannot support Chinese normally. I don t know what to do. I hope God can help me solve it. Thank you . all the code...