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 ...
the problem is shown in the following figure: : Why did you report Cannot read property each of undefined??? Solve ...
When webpack-v, the configuration file cannot be found. I don t know how to solve it. ...
<div id="div"> begin < div> <script> setTimeout(function() { alert( ui ); console.log( timeout1 ); new Promise(function(resolve) { console.log( promise3 ); resolve(); console.lo...
the animation effect is that the picture is sucked into a certain position, and in the process of being inhaled, the picture will deform and then disappear. It s kind of like the effect of Shenwei in Fire Shadow, just like being sucked in. ...
whether the tomcat, downloaded by http: tomcat.apache.org on this page is a stand-alone tomcat or an integrated tomcat? with an apache http server. 1 if it is the former, why can tomcat handle static resources? 2 if it is the latter, why is there no...