I have the following DAOParent class that I use to put connect/disconnect code in one place. Each DAO class in the application is an EJB that extends DAOParent (note that I don't use JPA): public class DAOParent { private InitialContext context = null; private DataSource ds = null; ...

Sorry for my noobness but I've never really used math in python. My goal is to create a dice rolling game in python. def roll_dice(): print("You rolled a " + str(random.randint(1,6))) if dice == "1": roll_dice() etc for as many as 3 dice. I need to know how to set winning conditions....

I have answered a Question in Stackoverflow link. a) Create a function called resize that can be used to increase the size of integer arrays dynamically. The function takes three parameters. The first parameter is the original array, the second parameter is the size of this array, and t...

i have an issue with my program as is written. I have the game going to the point of a win, which results in the winner being declared and the board being shown. I would like a restart function to then be ran. However I get the text but no input prompt. I also have the methods if that would help ...

While giving feedback on first answers, I often find it convenient to also link to How do I write a good answer? in the Help Center. Since I haven't thought about a good "template" text I can copy and paste (yet), I often find myself looking up that link in the Help Center myself. As you can see...

My TableView consists of four cells (for blacklisting categories) with a boolean property (indicated with a checkmark) and another cell with a UISwitch embedded in it. My current controller is as follows: class TableViewController: UITableViewController { var blacklisted = Set<Category>() ...

I am trying to enable a voting system where i can upvote and downvote using an enum and also i have applied the appropriate relationship between all classes but when i try to find the @course = Course.find(params[:id]) i get an error "can't find id= " empty id but when i use @course = Course.find...

I'm a beginner when it comes to path finding, so I decided to write an as simple as possible (to me) A* algorithm to learn. I looked up on internet the general idea and found some pseudo-code that I translated in Python. What I'm most interested in is if I'm missing some edge case or not (I wro...

I am beginner in scrapy. Can someone please help why it returns no data. I am trying to scrape email address from "https://www.iald.org/Designers?search=true&pt=&st=&stc=&sts=&sc=USA&ma=" Thank you Sir. # -*- coding: utf-8 -*- import scrapy class IaldSpider(scrapy.Spider): name = 'iald' ...

I've stumbled across some UI (React.js) code that I've worked out to have a time complexity of O(n^4) (I hope that's right, if not please do correct me). I was interested in how one might go about optimising something like this. I know that for() loops do perform slightly better than array.forEa...

-- Raspberry3, Python3, writing and compiling in GEANY-- The provided code for my CO2 sensor wasn't working, so i had to rewrite it. Have i done it correctly? I've borrowed some code snippets from the web. I need to make some variable parameters, and i don't know how to do it, in a good manner....

I have this counting sort for byte values running in linear time with respect to array length: Arrays.java package net.coderodde.util; import java.util.Random; /** * This class contains static methods for sorting {@code byte} arrays. * * @author Rodion "rodde" Efremov * @version 1.6 (Apr...

<template> <div> <el-button v-if="!authenticated" @click="visible = true">Login</el-button> <el-dialog :visible.sync="visible" title="Login or Register"> <el-tabs v-model="activeTab"> <el-tab-pane label="Login" name="login"> <log...

I tried to search and read for 10-12 hours on how to have a secure session, and this is the code that I came up with. (found no good book or article with complete guide about PHP Sessions, each had something and missed something else) Could you kindly please check if I have taken the necessary s...

I am Learning Javascript, after doing Java development for 2 years. I am doing a module on udemy which had a coding challenge which I completed and it works but wanted to get it reviewed to find out best practices and how the code can be improved and optimised. Here is the Challenge ///////////...

What I have: Mainly, a graph consists of 10000 nodes and around 500000 edges. I would like to construct a dictionary where keys are the edges and the value for each edge is an array consists of 0, 1, 2 or based on a comparison between the values of another dictionary (as detailed in the algori...

I've created a heavily problematic code that works. Summary: It looks through a folder structure, for png files and tries to replicate this structure in Photoshop. Files are mapped layers and Folders to Groups. I am using comtypes to access Photoshop and create the groups and layers. The issue ...

I have 3 types of coins: Gold, Silver, Copper. 1 silver = 100 copper. 1 gold = 100 silver. My input is always in coppers, and I want to be able to make it a bit more readable. So far my code is: def api_wallet_translate_gold(value): """Translate a value into string of money""" if va...

Was hoping to get some feedback on this code, and why I might be getting the output that I'm getting and not an output for what's left in stock. The output that I get is . Code is posted below, thanks: import requests from bs4 import BeautifulSoup as bs import random session = requests.sessio...

I just want to confirm that I am versioning my "versionable" fields correctly, and that there isn't another, better way to do this. I have a table event, a record of an event in time. It has some fields that I want to be invariant, like it's ID and event series it is associated with. It also has...

So I have solved the jug problem with 3 jugs: For jugs size A, B and C find the minimum number of steps to reach D, where D < max (A,B,C) My code is below. I am wondering if there are other ways, faster ways or more efficiency ways to compute the answer. Solution in Python 3 Thanks #Creat...

I have worked on a SFML Game/Game-Engine Project for 2 months now and am looking for some feedback in terms of... Is this a valid approach for a Game class ? Are there any glaring C++ coding practice mistakes ? The following code is from my Game class which is the main organizational unit of ...

I have a MVC project with a simple view where the user can add a customer by filling in name and address. The controller checks if the TextFields aren't empty and adds a new customer. I'm wondering whether I should move this to another class that handles creating a new customer from these fields,...

My code here has a chess matrix where a Tk window will appear when the pawn reaches the last block.The Tk window is created along with the buttons but the buttons won't work.And when I close the Tk window the last button command gets executed.This is just a part of my code,I can provide more if n...

In one of the youtube videos from Rachit Jain, He defines a problem with a set of restrictions and achieves it by using Builder Pattern and Interface Segregation Principle. Restrictions On creating an object for the class all the member variables must be initialized by the value given by the u...

I've made a little implementation of an undirected graph, using FIFO lists, for one of my homeworks. Never really knew how to write a proper FIFO data structure, so I would be glad to see some opinion of yours. #include <fstream> using namespace std; class Graph { class Node { ...

Problem 1 - Matrix powers in R R does not have a built-in command for taking matrix powers. Write a function matrixpower() with two arguments mat and k that will take integer powers k of a matrix mat. My attempted solution. matrixMul <- function(mat1, mat2) { rows <- nrow(...

Trying to set up express server that will authenticate a user's Google email before proceeding. The code below works, but is there any way to make it more elegant? The whole new Promise thing feels clunky. Still wrapping my head around async functions. All the googleapis functions are async, s...

Description: I am working on a classifier which categorizes the text based on some criteria, at present, it is a map of category and list of words if any of the words appear in the text, a category is assigned to it. The text can have multiple categories. The number of categories can be more tha...

I have an array of things and I need to find the valid one at runtime. Is this a reasonable use of undefined? Is there a safer way of doing this? Should I make the return value explicit in the null case instead of letting the undefined drop through? var ThingManager = { things : [], getV...

Okay so, I bought a laptop, installed an additional SSD (now running 1 HDD, 1 SSD), and now I'm trying to install the Manufacturer's customized Windows version. The problem is that that Windows version comes with its own installation script created by the manufacturer. When you try to install tha...

What I'm trying to do: implement the Vigenère cipher in Ruby. I already have a working version, but I want to make sure it is efficient and well-designed. module Crypto # Vigenère cipher encryption and decryption abstraction module Vigenere LETTERS = ('a'..'z').to_a.freeze private_co...