look at the first paragraph of code public class Test { public Test test = new Test(); public void say() { System.out.println("hello world!"); } public static void main(String[] args) { new Test(); } } ...
: class Test{} object Driver extends Test{ } : abstract Fruit{ val name :String val color :String } object Fruit{ object Apple extends Fruit("apple","red") val menu=List(Apple) } question: (1) Why object in scala can al...
Why do these url jump back to the selenium of middleware via selenium jump to the url request crawled down the page in scrapy, instead of calling back to the following def def parse(self, response): contents = response.xpath( *[@id="...
how to use the element table to implement the following table has no clue at present, mainly about how the middle search line should realize the hope God to provide valuable advice ...
ask for help element margin sets 200px, that is, offsetleft and offsettop are 200px legend, when my mouse slips in from above and triggers mouseenter, the detected mouse position is not the edge of the element ask for a positive solution $("....
when importing maven projects main.javapackage but colleagues do not have this kind of problem when using it. Has any god ever encountered a similar situation? there is no train of thought. ...