I am trying to perform some conversions with multidimensional array in C# and I have checked the discussion ConvertAll and 2-dimensional arrays. I found that Array.ConvertAll still not support multidimensional array cases. Therefore, here's an experimental implementation for handling the process ...

I have the following code to do a majority vote for data in a dataframe: def vote(df, systems): test = df.drop_duplicates(subset=['begin', 'end', 'case', 'system']) n = int(len(systems)/2) data = [] for row in test.itertuples(): # get all matches fx = test...

Based on what i understood of Binary Tree, queue and recursion i implemented this Bread First Search algorithm as follow. Do you have any suggestions to improve (in term of readibility, good practice etc...) it ? # Definition for a binary tree node. class Node(object): def __init__(self, val=...

I am using null as a sentinel/trip value to break out of foreach: private VacantSummaryPage SelectPropertyFromDb(string sql) { VacantProperty vacantProperty = null; var vacantProperties = GetProperties(); foreach (DataRow row in SqlServer.ExecuteQuery(sql).Rows) { vacantPr...

I am solving LeetCode Dynamic Programming challenges (this one is #72, at https://leetcode.com/problems/edit-distance). Here below, I've implemented a Rust solution for the minimum edit distance between two strings problem use std::collections::HashMap; use std::cmp::min; impl Solution { pub...

I see this post has one deleted answer that has some good advice and received three upvotes. I don’t see much reason for the OP of the answer to delete it other than to earn the disciplined badge. This leaves the question as “unanswered”. I searched CR meta for insights but didn’t find much. Then...

Following this post, I have been playing with System.Threading.Channel to get confident enough and use it in my production code, replacing the Threads/Monitor.Pulse/Wait based approach I am currently using (described in the referred post). Basically I created a sample with a bounded channel where...

I have 6 classes: A, B, C, D, E, F. All are derived from the same abstract base class Base. Everyone of them has a do_something method that will be triggered by a mediator object. The problem is that they expect different parameters for the method: Classes E and F don't need any parameter at all....

Producer-consumer problem is a common paradigm for cooperating processes. A producer process produces information that is consumed by a consumer process. One solution to the producer-consumer problem uses shared memory. To allow producer and consumer processes to run concurrently, there must be a...

I'm a SQL learner. In answering the question* For the region with the largest sales total_amt_usd, how many total orders were placed? for the following schema: (I am unsure of the dialect is but I think it is Postgres) I came up with the following solution and I wonder if am committing any bad p...

I am solving this problem on Spoj https://www.spoj.com/problems/LASTDIG/ there are given n test cases and then two numbers a and b and the output has to be the last digit of a^b Also the source code must be <=700bytes. This is why I tried to omit some spaces. #include <iostream> #include <cmath> ...

I would really appreciate feedback on my OOP Household Outgoings calculator. My objective is to develop in OOP. Have I used good OOP techniques? How can I improve on it? And anything else you might add. Thank you very much advance for anyone who spends their time reviewing it. I've learned so muc...

See this link for previous post on this subject Generating mathematical questions and answers I have an Android quiz app that I am building to learn kotlin / android app development. Here is an object I have which acts as one of many question builders. Since my last post I have: broken down the ...

I'm a total beginoob in Lua. The aim is to display a 3D Torus in dots (see Figure1), or at least compute the positions, privileging clarity over performance. Pseudocode link. Don't hesitate to be picky, I'd like to learn proper Lua idioms. For instance, I was pleased to find operator overloading,...

I have designed a tool rental application in Java and wanted others to provide criticisms of the design and implementation. Specifically, the implementation of the service layer. https://github.com/geewalk/gw0221 package com.gwalk.demo.service; import com.gwalk.demo.domain.*; public class Chec...

I am writing a program that has a 'base' class called 'Group'. The class will have only one instance. Aside from some properties and methods, it needs to keep track of a variable amount of group_companies. After working with the program (that may involve adding or deleting group_companies), I wan...

I have a stock document. { "_id": "601022171517ee00d48ce6ad", "caseQuantity": 4, "unitQuantity": 395, "totalQuantity": 2000, "currentQuantity": 1995, "isClaimActive": "true", "claim": 32, "status": "Active", "purchaseInventoryId":"601022151517ee00d48ce6ac", "

(I'm unsure if this is the correct exchange, please tell me) I've been trying to understand the following code: bool* bools = new bool(p) bools[4] My current understanding is the following: Line 1: allocate memory for p bools. put the address of the first bool in bools. Line 2: add four(bool...

I'm writing my program in python and have it working properly, but it's over 500 lines of code. I think there is a way I can condense my code, but I'm not sure how I should do it Here's an example of some of my code: def click(): if clicked1.get() == "app1": os.startfile(r"C:\Users\re...

I want to solve for n in the expression (binomial coefficient): let y = (Math.pow(n, 2) + n) / 2; I know the y value, but I want to compute n. Here is what I have so far, but I would want to know if there was a way to compute the value rather than look it up. In this example, I have to lookup t...

I have a DataGridView which displays an employee list. I use the employee ID to filter my global employee list and display information about the selected employee in various listboxes. This is my first coding project, and I'm pleased that it's working well, but I do feel like I'm repeating myse...

//the strategy of take the rest of division by 1e06 is //to take the a number how 6 last digits are 269696 while (((square=current*current) % 1000000 != 269696) && (square<INT_MAX)) { current++; } This is part of the "C" example on rosettacode.org. The comments, and not only them...