class

问题 I need a table variable in a Lua class, which is unique for each instance of the class. In the example listed below the variable self.element seems to be a static variable, that is used by all class instances. How do I have to change the testClass to get a non static self.element table variable? Example: local testClass ={dataSize=0, elementSize=0, element = {} } function testClass:new (data) local o = {} setmetatable(o, self) self.__index = self -- table to store the parts of the element

问题 So I want to have the Zombies spawn around the player (the number of Zombies should increase as time passes). Since I don't want the player to die instantly I need the Zombies to spawn away from the player at a certain distance but other than that a random location. import pygame import turtle import time import math import random import sys import os pygame.init() WHITE = (255,255,255) GREEN = (0,255,0) RED = (255,0,0) BLUE = (0,0,255) BLACK = (0,0,0) BGColor = (96,128,56) ZColor = (221,194

问题 I have two abstract base classes, class_data and BaseClass , with derived classes overridden_class_data : public class_data and DerivedClass : public BaseClass : class class_data{ public: int val_a = 0; double val_b = 0.; }; class overridden_class_data : public class_data{ public: int val_c = 0.; }; class BaseClass{ public: BaseClass(){}; virtual void print_data() = 0; virtual class_data *get_local_data() = 0; class_data local_class_data; }; class DerivedClass : public BaseClass{ public:

问题 I have two abstract base classes, class_data and BaseClass , with derived classes overridden_class_data : public class_data and DerivedClass : public BaseClass : class class_data{ public: int val_a = 0; double val_b = 0.; }; class overridden_class_data : public class_data{ public: int val_c = 0.; }; class BaseClass{ public: BaseClass(){}; virtual void print_data() = 0; virtual class_data *get_local_data() = 0; class_data local_class_data; }; class DerivedClass : public BaseClass{ public:

问题 Tried searching for this and could not find a suitable answer. I know we can do the following to create a menu to the root window in tkinter menu = Menu(root) some_menu = Menu(menu, ....) some_menu.add_command(label = some text, command = some command) .... menu.add_cascade(label = some title, menu = some_menu) root.config(menu = menu) now let's say that we passed some_menu to the root config instead then it would display the cascade menu's options / children horizontally across the top bar

问题 Tried searching for this and could not find a suitable answer. I know we can do the following to create a menu to the root window in tkinter menu = Menu(root) some_menu = Menu(menu, ....) some_menu.add_command(label = some text, command = some command) .... menu.add_cascade(label = some title, menu = some_menu) root.config(menu = menu) now let's say that we passed some_menu to the root config instead then it would display the cascade menu's options / children horizontally across the top bar

问题 Tried searching for this and could not find a suitable answer. I know we can do the following to create a menu to the root window in tkinter menu = Menu(root) some_menu = Menu(menu, ....) some_menu.add_command(label = some text, command = some command) .... menu.add_cascade(label = some title, menu = some_menu) root.config(menu = menu) now let's say that we passed some_menu to the root config instead then it would display the cascade menu's options / children horizontally across the top bar

问题 Tried searching for this and could not find a suitable answer. I know we can do the following to create a menu to the root window in tkinter menu = Menu(root) some_menu = Menu(menu, ....) some_menu.add_command(label = some text, command = some command) .... menu.add_cascade(label = some title, menu = some_menu) root.config(menu = menu) now let's say that we passed some_menu to the root config instead then it would display the cascade menu's options / children horizontally across the top bar

问题 I am trying to pass a variable from a function to a class. Example code is below: def hello(var): return var class test(): def __init__(self): pass def value(self): print var hello(var) test = test() test.value() I would like to pass var into the class test() . Thanks for any help. 回答1: You need to modify your class like this: class test(): def __init__(self, var): self.var = var def value(self): print self.var test_inst = test(var) test_inst.value() Also, you cannot use the same exact name

问题 I am trying to pass a variable from a function to a class. Example code is below: def hello(var): return var class test(): def __init__(self): pass def value(self): print var hello(var) test = test() test.value() I would like to pass var into the class test() . Thanks for any help. 回答1: You need to modify your class like this: class test(): def __init__(self, var): self.var = var def value(self): print self.var test_inst = test(var) test_inst.value() Also, you cannot use the same exact name