the relative s little boy, 6 years old, his parents want him to enlighten him in programming. How to get started? are there any recommendations for APP, books and toys? < hr > reply uniformly, some respondents feel that the requirements for 6-year-ol...
needs to record and count the user s behavior, such as when the user visited which pages, the number of visits per day, and so on. business needs to be built on its own, can not use third-party Baidu webmaster, Youmeng statistics, and so on. what open...
Server bandwidth 1m I casually wrote a page test in which I put ten pictures each with a size of more than 100 kb. Every time I opened the page, the first few pictures were loaded at a normal speed, and three or four images could not be loaded for a lon...
this is the small yellow circle. If the value of is very large, the circle is too large, how can it be scaled down in proportion ...
if "video " not in json.dumps (content): if cover_web not in json.dumps(content): can these two if be written in or and and forms such as if video not in or if cover_web not in ...
class B { public static $s = baked; public function m () { echo self::$s; B $this actually points to the instance of D, how can I access the DVDs? } } class D extends B { public static $s = Downs; } $d = new D (); $d-> m (); of ...
problem description I use cascading selector to refresh and report this error as soon as I come up. Why? Let s have a look, gods. the environmental background of the problems and what methods you have tried related codes Please paste the...