class

问题 For general classes manipulation understanding; given the following use case : class Child1 def process var 'child1' + var end end class Child2 def process var 'child1' + var end end class Child3 def process var 'child3' + var end end ... class Master attr_reader :var def initialize(var) @var = var end def process [ Child1.new.process(var), Child2.new.process(var), Child3.new.process(var) ] end end by some kind of inheritance or structure, would there be a way to have var available to all

问题 I can use a function's attribute to set a status flag, such as def Say_Hello(): if Say_Hello.yet == True: print('I said hello already ...') elif Say_Hello.yet == False: Say_Hello.yet = True print('Hello!') Say_Hello.yet = False if __name__ == '__main__': Say_Hello() Say_Hello() and the output is Hello! I said hello already ... However, when trying to put the function in a class, like class Speaker: def __init__(self): pass def Say_Hello(self): if self.Say_Hello.yet == True: print('I said

问题 I need to create an instance in class Crop of Plant class and i cant manage to find a way to make that work. Hope you guys can help at that. This my main where i'm sending an object to the class crop. int main(){ char select = 'a'; int plant_num = 2; int crop_num = 0; Crop crop[10]; Plant plant[20]; plant[0] = Plant("Carrots",'c'); plant[1] = Plant("Lettuce",'l'); plant[2] = Plant("Rosemary",'r'); crop[0] = Crop(plant[0],4,2); crop_num++; cout << "Garden Designer" << endl; cout << "==========

问题 I have answered my own question - see answer below I'm writing a class, and I want this behavior: a = f(10,20) some_funct(a.row) # some_function is given 10 some_funct(a.col) # some_function is given 20 some_funct(a) # some_function is given a tuple of 10, 20 <-- THIS ONE :) The last behavior is stumping me. I have not seen any examples that cover this. Thus far: class f(object): """Simple 2d object""" row: int col: int def __init__(self, row, col): self.row = row self.col = col Explictly I

问题 I have answered my own question - see answer below I'm writing a class, and I want this behavior: a = f(10,20) some_funct(a.row) # some_function is given 10 some_funct(a.col) # some_function is given 20 some_funct(a) # some_function is given a tuple of 10, 20 <-- THIS ONE :) The last behavior is stumping me. I have not seen any examples that cover this. Thus far: class f(object): """Simple 2d object""" row: int col: int def __init__(self, row, col): self.row = row self.col = col Explictly I

问题 I want to, when the user selected (through Many2one field) a category, I need to find its related parent_id for Brands to add a domain filter on another Many2one field to have related child entries of these Brands. As I am beginner I failed to how to do this. Suppose Many2one field category_id here, user will select a category from first three entries, now we know that user wants to add an Electronics related item then system should populate Many2one field brand_id on Electronics related

问题 I am new to the stackoverflow community, and new to programming in general. One of my first projects is to build a web scraper to see if I can collect market data. In attempting to build this, I keep getting stuck with an unbound local error. I am aware that this has something to do with how I am instantiating my class and how I am referencing the variable, strong text but not sure how to trouble shoot it.. class Stock: def __init__(self,symbol,company): self.symbol = symbol self.company =

问题 My understanding is that a subclass behaves exactly like the parent class except for the additional methods or those that get "rewritten" with the new and override keywords. Apparently, that's not correct. Please see the code below (brackets removed for readability) class BIG protected void Output(string text = "") Console.WriteLine("BIG - " + text); public void CallingOutput() Output("Outputting..."); class SMALL:BIG public new void Output(string text = "") Console.WriteLine("SMALL - " +

问题 I was building a Huffman coding tree and I wanted to create an array where each position contains a separate tree, as the code follows: // Number of initial nodes int number; cin >> number; int* weights = new int[number]; for (int i = 0; i < number; i++) cin >> weights[i]; // Convert to huffman tree with one element intHuffTree* tree = new intHuffTree[number]; for (int i = 0; i < number; i++) { tree[i] = intHuffTree(weights[i]); } where the class is defined like: // Huffman tree with integers

问题 I was building a Huffman coding tree and I wanted to create an array where each position contains a separate tree, as the code follows: // Number of initial nodes int number; cin >> number; int* weights = new int[number]; for (int i = 0; i < number; i++) cin >> weights[i]; // Convert to huffman tree with one element intHuffTree* tree = new intHuffTree[number]; for (int i = 0; i < number; i++) { tree[i] = intHuffTree(weights[i]); } where the class is defined like: // Huffman tree with integers