as mentioned above, you can see the following line in the code: return $teacher_name ?: ---- ; What is the name of this operator, please? What does it mean? ...
What are the general uses of the bit operator? For example, to solve a problem, it is very simple to use the bit operator. ...
in other words, a > = b equals astatb | | a > b or a > b | | astatableb? ...
Integer a = 1; Integer b = 2; Long c = 3L; c = a compiler error will result in the error that int cannot be converted to long System.out.println (compiled normally, resulting in true Why? I know that when int and long add up, they both turn i...
found a very interesting phenomenon in PHP, but I don t know how to explain it. The code goes like this: $str1 = "01 "; $str1PP; echo $str1; 01 $str1 = "01"; $str1PP; echo $str1; 2 Why is it interesting ...
does not follow the process, unable to notify the backend to delete user_id, then the second login within the expiration time will return the login. What do I have to do in the front end, or what do I have to do in the background? ...
problem description the title may not be well described. Let s explain in detail what text conversion means. for example, I received a field called content, from the background, but if I want to put it in the selector, I need to use the copy: thi fi...
commonly used animate css now I want to zoom in on the animation where the button is clicked when you cancel, zoom and hide to the position of the button this kind of animation should need js to realize is pure css not allowed is there any spe...
the exception that vue better-scroll rolls to the bottom when a new message is loaded. let disY=60; scrolls normally let disY= el [el.length-1] .clientHeight; this makes scrolling unusual. See the picture below for details. RequestAxios(comment,f...
I d like to check, how to pass the local film through the php video? suppose I have a profile that is full of slices but how can I buy each slice via php without changing the name of the clip? I can read, but only for uploading. I really don t kn...