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 ...
problem description vue can t get the picture src using v-for related codes Please paste the code text below (do not replace the code with pictures) < template > <div class=imgBox> <div class="imgList"> <div...
http: shrek.imdevsh.com demo. ask for help: the principle of inertia retardation effect in demo touchmove ...
the records of Quartz throwing JobExecuteExcetption, database job and trigger disappear during the execution of job. How to make job execute again ...
denyhosts mistakenly sealed colleague IP, how do I unseal it? I can t add IP to the whitelist and delete this IP from hosts.deny. ...
use postcss in vue-cli2 I introduced style.css in main.js style.css index.vuestyle.css background: style.cssbackground: ask for an explanation ...