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比较类中的两个对象

I was stuck in this question. I have done most of the parts but the last part in which we were supposed to compare it, I was stuck in that part could help me up with this in python. A class called Actor is designed to model a movie’s actor. It contains thr...

由 zamet发布于 2021-01-13 09:25:00 pythoncompareclassmethodsinstance
Pygame colliderect工作不正常

我写这段代码是为了构建一个简单的正方形，它可以左右移动，并且可以使用pygame中的colliderect函数在舞台上跳跃，但问题是当玩家（正方形）在舞台上跳跃时，它的y坐标会永久性地变为舞台的y坐标，并且永远不会掉下来。另一个大问题是，当球员在台下时，他不应该跳到上面，但它确实跳到了上面。我的代码包含四个页面，第一部分包含主循环，第二部分包含player类，第三部分包含stage类，第四部分包含基本的游戏函数主——第01页 import pygame from player import Player ...

由 ket发布于 2021-01-13 09:10:52 pythonpygameclass
如果多个元素有一个类，则为javascript条件

我的问题；嗨，有这个html吗 <div> <button type="button" id="a"></button> </div> <div> <button type="button" id="b"></button> </div> <div> <button type="button" id="c"></button> </div> <div class="hidden" id="a1"> <p>text1</p> </div> <div class="hidde...

由情断心却相发布于 2021-01-13 07:10:16 javascriptbuttonclassconditional-statements
c#如何最好地将数组或列表放入具有名称的类中？

我不是用我以前的非面向对象的方式，而是努力做人们认为最好的事情。我需要存储大约9个不同长度的Int数组。我还需要将它们与一个字符串名“this is called etc…”相关联，我认为将所有这些都存储到一个类对象中是有意义的，这样我以后就可以干净地遍历它们，而不用使用相同的for循环迭代器查找两个不同的位置。例子： public class Thing { public List<int> SDNA {get; set;} public string Name {get; set;} ...

由 oad发布于 2021-01-13 07:05:51 c#oopclassjagged-arrays
如何将简单函数转换为类？

How do I convert this code into a class component? the problem is const {value} = useDarkMode (false); I don't understand how to apply it in a class component import './Content.css' import useDarkMode from 'use-dark-mode'; export default function Content ...

由 qquas发布于 2021-01-13 06:46:03 javascriptcomponentsclassfunctionreactjs
Is the nested class/struct handled the same way when passed? If a class is passed by const reference, is the nested class also h

Suppose you create a class class X { private: int x; myStruct foo; // myStruct is a struct public: X(); // Constructor X(int, myStruct); // Parameterized Constructor X(const X& other); // Copy Constructor void example(const X& a); /...

由不在服务区发布于 2021-01-13 06:12:16 c++classstructcopy-constructor
C# using form values in classes

How do you get a value from the form. For example using a trackbar value and use it in a class. ive tried _poleHeight = _heightTrackBar.value;

由有夫之夫发布于 2021-01-13 05:51:23 c#class
How to call python function in virtual environment?

My class looks like this from decimal import Decimal import delorean class PriceLog(object): def __init__(self, timestamp, product_id, price): self.timestamp = timestamp self.product_id = product_id self.price = price def ...

由 mnam发布于 2021-01-13 05:36:41 pythonvirtualenvclassfunction
Create a class that extends another custom class in Flutter

I have created class Blabel that extends StatelessWidget. I want to extend it to Blabel1 , keeping all of its properties and adding some extra properties to it. Let's say I would like to add textDirection property to the new class. How can I do it? Here is...

由毁灭发布于 2021-01-13 05:04:14 fluttertextclass
apply frame from external file in python 3.x?

Is there any way to apply a frame from external module to a root window. i have 2 files: in a.py which has the line self.root = root() and i have a function in a class which imports b.py and in b.py i have a class and instantiated a Frame to display in roo...

由原静安发布于 2021-01-13 04:49:53 pythonoopclasstkinterpython-3.x
How can I access an enum member with an input in python

I am trying to access the value of the enum variables with an input. Here is my code: class Animals(Enum): Dog = 1 Cat = 2 Cow = 3 Choose = input('Choose an animal') print(Animals.Choose.value) Which gives me an error perhaps because Animal...

由 ofbgg发布于 2021-01-13 04:37:58 pythonenumsclassattributeerror
如何在android Java中使用子类（继承）

我对编码相当陌生，请帮助我理解如何在android和Java中使用继承。让我用一个例子来解释我的问题：有一个父类叫做“Animal”，它包括“name”和“age”，有两个子类“Dog”和“Cat”。“Dog”类具有“name”、“age”、“food”属性，“Cat”类具有“name”、“age”、“bride”属性。据我所知，最佳做法是：属性为“name”、“age”+constructor和getter、setter的动物类 public class Animal{ privat...

由 det发布于 2021-01-13 04:20:28 JavaAndroidinheritanceclassandroid-listview
你能在PHP中遍历抽象类下的所有对象吗？

重新措辞：您能遍历从抽象类下的类实例化的所有子对象吗？

由凹凸Man发布于 2021-01-13 04:07:44 phploopsclassabstract
如何在wso2ei中将布尔属性传递给类中介

有没有办法将布尔参数传递给类中介器？我尝试了以下代码块。 public class CustomMediator extends AbstractMediator { private String cacheEnabled; public boolean mediate(MessageContext messageContext) {} public String isCacheEnabled() { return cacheEnabled; } ...

由 ~迷糊娃~发布于 2021-01-13 04:02:14 Javaclasswso2wso2esbwso2ei
如何在java方法中打印实例变量？

我正在尝试在show（）方法中打印变量。但每次都会显示默认值，比如字符串NULL和整数0。我用了一个参数化构造函数。因为我需要在创建类的对象时传递参数，而不是传递参数，所以我想传递任何变量，该变量将从用户那里携带该变量的值，但我无法执行。 import java.util.*; public class Cons_With_Arg { String s; int i; // Scanner sc=new Scanner(System.in); Cons_With_Arg(...

由凉人夢发布于 2021-01-13 03:51:27 Javaobjectclassconstructorparameter-passing
如何从复杂的JSON结构/文件[closed]创建java类

Closed. This question needs to be more focused. It is not currently accepting answers. ...

由手拿香烟发布于 2021-01-13 02:27:58 Javajsonclass
PHP创建同一对象的两个或多个实例，是否可以从第一个对象检索信息？

我有一个小项目正在进行，因为我不是在OOP的最好的，我来这里寻求一些帮助。 class truckinfo { public $vendor; public $truckcount; public $plate; } 现在，我从其他地方获得诸如车牌或供应商之类的信息，然后在列表中显示卡车。 for($i = 0; $i < 3; $i++){ $truck = new truckinfo(); $truck->plate = "abc" . $i; $tr...

由逢水之发布于 2021-01-13 02:11:59 phpclassinstance
错误消息：“像素和大小无法解析或不是字段”

I've run this code this in the newest version of Eclipse but in that, it did not specify this error message but did point at the pixels[x + y * width] = Sprite.grass.pixels[(x & 15) + (y & 15) *Sprite.grass.SIZE]; line of the code. So I didn't know what ...

由 Linda发布于 2021-01-13 02:09:32 Javaarraysclasssize
实例类与（）-PHP[closed]

Closed. This question is opinion-based. It is not currently accepting answers. ...

由唯Ta命发布于 2021-01-13 01:40:26 phpclass
Changing Exception type to base class

I have two projects. In one of them I use MailKit and it is responsible for all kinds of email. Here I could get SmtpCommandExceptions or SmtpProtocolExceptions that are derived of CommandException which is derived of the normal System.Exception. I want to...

由 bsint发布于 2021-01-13 00:40:12 c#exceptionclassderived-classmailkit

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