class

问题 I am making an accordion using CSS, the below is my use of CSS class without space. I use this to eliminate the animation of padding during slideDown and slideUp effect .acc_container.block{ padding: 20px; } since it stated out that padding is 20 pixels but when i check it seems like no padding at all!! instead, i need to add this in order to let my padding works .acc_container. block{ padding: 20px; } (with space) So what's the difference between the class in CSS with and without a space?

问题 Is there a generally accepted best practice for creating a class whose instances will have many (non-defaultable) variables? For example, by explicit arguments: class Circle(object): def __init__(self,x,y,radius): self.x = x self.y = y self.radius = radius using **kwargs: class Circle(object): def __init__(self, **kwargs): if 'x' in kwargs: self.x = kwargs['x'] if 'y' in kwargs: self.y = kwargs['y'] if 'radius' in kwargs: self.radius = kwargs['radius'] or using properties: class Circle(object

问题 so I'm currently doing an exercise for college that has several optional parts (because we havn't done this in class yet), one of them being to use lists instead of arrays (so it'd be variable size) and another one printing the list sorted by points (I'll get to that now) So, I have the Player.java class which looks like this. public class Player { String name; String password; int chips; int points; public Player(String n, String pw, int c, int p) { name = n; password = pw; chips = c; points

问题 so I'm currently doing an exercise for college that has several optional parts (because we havn't done this in class yet), one of them being to use lists instead of arrays (so it'd be variable size) and another one printing the list sorted by points (I'll get to that now) So, I have the Player.java class which looks like this. public class Player { String name; String password; int chips; int points; public Player(String n, String pw, int c, int p) { name = n; password = pw; chips = c; points

问题 When I started learning Python, I created a few applications just using functions and procedural code. However, now I know classes and realized that the code can be much readable (and subjectively easier to understand) if I rewrite it with classes. How much slower the equivalent classes may get compared to the functions in general? Will the initializer, methods in the classes make any considerable difference in speed? 回答1: No. In general you will not notice any difference in performance based

问题 Im kinda new to python classes and I dont know how to handle them well yet, and I promise I've done some research to solve this problem but still cant figure out how to. So, here it goes: I'm trying to use python classes to define tkinter widgets so I can implement them rather quickly. It all worked well with buttons and labels but with I cant get it with entries. I'll show you how I've coded buttons and labels to illustrate what im trying to do with entries as well (and maybe you guys can

问题 Im kinda new to python classes and I dont know how to handle them well yet, and I promise I've done some research to solve this problem but still cant figure out how to. So, here it goes: I'm trying to use python classes to define tkinter widgets so I can implement them rather quickly. It all worked well with buttons and labels but with I cant get it with entries. I'll show you how I've coded buttons and labels to illustrate what im trying to do with entries as well (and maybe you guys can

问题 Im kinda new to python classes and I dont know how to handle them well yet, and I promise I've done some research to solve this problem but still cant figure out how to. So, here it goes: I'm trying to use python classes to define tkinter widgets so I can implement them rather quickly. It all worked well with buttons and labels but with I cant get it with entries. I'll show you how I've coded buttons and labels to illustrate what im trying to do with entries as well (and maybe you guys can

问题 I'm trying to create a class which can be used for connecting to MySQL database. This is my code: The class: <?php class createCon { var $host = 'localhost'; var $user = 'root'; var $pass = ''; var $db = 'example'; var $myconn; function connect() { $con = mysqli_connect($this->host, $this->user, $this->pass, $this->db); if (!$con) { die('Could not connect to database!'); } else { $this->myconn = $con; echo 'Connection established!';} return $this->myconn; } function close() { mysqli_close(

问题 I have two classes; BuildableObject and TempObject . For some reason, Unity is treating TempObject like a MonoBehaviour class in which it throws an error if I use Resources.Load() from the constructor. Why is this, and how do I fix it? public abstract class BuildableObject { public abstract Vector2Int Space { get; set; } public abstract GameObject Body { get; set; } public void Init(GridSpace[,] World, Vector2Int pos) { Vector3 Pos = World[pos.x, pos.y].pos; //TODO: Optimize //TODO: Add