I have just come into contact with Python , and currently use python 3.6 . I have encountered some problems about class attributes. The code is as follows: class A(): def __init__(self): self.x = 0 self.y = 0 self.z = [sel...
I want to get the content " product detail 10552 " that begins with the third-to-last slash of str. How should I get it? "http: 1.2.3.4 aaa product detail 10552" "https: aaa.bbb product detail 10552" "http: aaa.bbb.ccc.net...
CustomScrollView is used in Flutter to nest SliverGrid components. When the controller property of CustomScrollView is set, the Sliver effect becomes invalid effect: description: when you slide the list of SliverGrid components, you need to move ...
this table is generated from the database. Now there are only two pieces of data, so there are only two. How can I get the value of the current first column when I click delete? ...
the front end of the php project used by the company has always been an opportunity for html css jquery to use the vue react framework, so it is just a matter of learning. Would you like to ask if there are still those who do not use the framework at the...
suppose there is an array like this var qq = [ { "group": 100, "info": {"event": 123}, "main": true, }, { "group": 100, "info": {"event": 323}, "...