How to use a class in DLL?

If you use run time dynamic linking (uses LoadLibrary to load the dll) you cannot access the class directly, you need to declare a interface for your class and create a function that returns a instance of this class, like this: class ISDLConsole { public: virtual void getInfo(int,int) = 0; virtual void initConsole(char*, char*, SDL_Surface*, … Read more

Get the object with the max attribute’s value in a list of objects

max() takes a key parameter, a function that when passed one of the objects returns the value by which to compare them. Use operator.attrgetter() to get that value: from operator import attrgetter max(self.allPartners, key=attrgetter(‘attrOne’)) This returns the matching object for which that attribute is the maximum. If you wanted to store just that maximum value … Read more

Which is best for data store Struct/Classes?

I would make the choice based on the following criteria reference type vs value type semantics. If 2 objects are only equal if they are the same object, it indicates reference type semantics => class. If the value of its members defines equality (e.g. 2 DateTimes are equal if both represent the same point in … Read more

Tkinter example code for multiple windows, why won’t buttons load correctly?

I rewrote your code in a more organized, better-practiced way: import tkinter as tk class Demo1: def __init__(self, master): self.master = master self.frame = tk.Frame(self.master) self.button1 = tk.Button(self.frame, text=”New Window”, width = 25, command = self.new_window) self.button1.pack() self.frame.pack() def new_window(self): self.newWindow = tk.Toplevel(self.master) = Demo2(self.newWindow) class Demo2: def __init__(self, master): self.master = master self.frame … Read more

Instantiate a class from its textual name

Here’s what the method may look like: private static object MagicallyCreateInstance(string className) { var assembly = Assembly.GetExecutingAssembly(); var type = assembly.GetTypes() .First(t => t.Name == className); return Activator.CreateInstance(type); } The code above assumes that: you are looking for a class that is in the currently executing assembly (this can be adjusted – just change assembly … Read more

Regular expression matching fully qualified class names

A Java fully qualified class name (lets say “N”) has the structure N.N.N.N The “N” part must be a Java identifier. Java identifiers cannot start with a number, but after the initial character they may use any combination of letters and digits, underscores or dollar signs: ([a-zA-Z_$][a-zA-Z\d_$]*\.)*[a-zA-Z_$][a-zA-Z\d_$]* ———————— ———————– N N They can also not … Read more

How to implement a binary search tree in Python?

Here is a quick example of a binary insert: class Node: def __init__(self, val): self.l_child = None self.r_child = None = val def binary_insert(root, node): if root is None: root = node else: if > if root.l_child is None: root.l_child = node else: binary_insert(root.l_child, node) else: if root.r_child is None: root.r_child = … Read more