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 ...
Why can this js code output a? What do two dots mean? Object.prototype.a = a ; console.log(1..a) a ...
how to implement the parity line of the Table component the color is different after hover! Beg urgently! Thank you ...
JS interface security domain name as long as enter abc.com and then on the http: abc.com index.php?a=index&c=index page is OK? Why did I report the mistake of invalid url domain? official explanation The domain name of the current page of invali...
look at official tutorial I can t understand it. I haven t tried it for a long time. Which god will give me some advice? ...
how to deactivate when you click enable and enable when you deactivate. ...