I'm trying to create a small div inside a section every time I click a button. The section is id="grid" and the button has a simple onclick="generateGrid()" my code: var div = document.createElement('div'); function generateGrid() { document.getElementById("grid").appendChild(div); } Th...

I read the excellent answer to the question Example of adding STL iterator support to custom collection class on this site; but would like furthermore the iterator class to be a nested class (because of shared types). The skeleton I want is: template <typename T, std::size_t Capacity> class Ring...

I am working on Leetcode challenge #3 (https://leetcode.com/problems/longest-substring-without-repeating-characters/) Here is my solution using sliding window and a dictionary. I specifically added start = seen[s[i]]+1 to skip ahead. I am still told I am far slower than most people (for example,...

Pretty obvious what it's doing here, but It seems pretty silly. What's a better way? public bool DidHitBounds { get { if (hitBounds == true) { hitBounds = false; return true; } else { return false; } } ...

Write Java program that displays all the uppercase and lowercase alphabetic characters, the digits 0 through 9, and the symbols +, -, _, =, &, @, #, $, ?, >, <, |, !, ~, a blank space character as well as their ASCII integer values. public class PrintAlphabetsInJava{ public static void main(Stri...

I am using Spring Data JPA with Spring boot application. My requirement is to insert 50K rows in JPA entity table in one hr or less. I have 3 entities A,B and C. Entity A have one to many associations with entities B and one to one assiciation with entity C @Entity public class A { @OneT...

I'm an absolute python beginner. I created a draw poker game that works fine up to about ten thousand hands, at which point it starts to freeze and not generate the hands. Given that straight flushes only generate about once per 70 thousand hands (it may be more common bc my program uses multipl...

I want to write specs for controllers, Example: require "rails_helper" RSpec.describe RemindersController, :type => :controller do context "when the user is an admin" do it "should list of all Reminders" do user = create(:user) if user get :list, params: { use_route: '/reminders' ...

In trying to code an iterator, I have the following structure: template <typename T> class mything { typedef unsigned key; public: template <typename subT> class myiter { key pos; public: ... } using iterator = myiter<T>; using const_iterator = myiter<const T>; using revers...

I had written this function with the following driver program and output: #include <array> #include <vector> #include <iterator> // Forward iteration from begin to end by step size N. template<typename Container, typename Function> void for_each_by_n( Container&& cont, Function f, unsigned incr...

I have following python code - def get_subject_from_stream_id_and_subject_id(stream_id, subject_id): #(stream_id, subject_id): ("subject_name") return { (1, 1): "Accounts", (1, 2): "English", (1, 3): "Organization of Commerce", (2, 1): "Physics", (2, 2): "English", (2, 3...

I am trying to list every 4th byte in a file with roughly 1200 bytes, What would be the best way to go through and list out only every 4th byte in the file (so byte 0, byte 4, byte 8, 12, 16, etc) and ignore all other bytes in order? I had seen something like: List<long> searchResults ...

I am new to programming and I am trying to solve the 8-puzzle using brute force algorithm. The code works for very simple puzzle configuration but freaks out when the even a modest puzzle is input to it. Initially I was working with a format for board as: [['1','2','3'],['4','5','6'],['7','0','8...

Introduction The Radio Data System (RDS) is a digital signal modulated onto a 57 kHz subcarrier of broadcast FM radio (above the 19 kHz pilot tone and 38 kHz stereo difference channel). The details of the modulation scheme are unimportant here; we assume that the output of demodulation is a ser...

The script below is intended to retrieve digital signage data from a server on Linux and Windows systems. The script needs to be copy and run, so I am limited to Python's standard library. The script has two modes: In normal mode it just updates the data and terminates. In server mode it listen...

I have data as follows: Payment Date 11/01/18 01/01/2019 11/01/09 11/01/20 Total Amount 4536.87 4654.98 4698.63 4687.69 I need to add up all of the Total Amount starting from 11/01/18 through 11/01/20. For the months in between dates, I need to use the amount from previous month...

I have created a 2 player Dice game. The idea is that each player in turn rolls the dice. This is a 6 sided each, 2 dice per player. After each roll the numbers need to be added. var myScore = document.getElementById("score"); var die3 = document.getElementById("die3"); var die4 = document.getEl...

I have implemented a QuickSort-Algorithm in C myself as an exercise, and in general, it works fine. First of all, I found a bug, which occurs in about 1% of the generated unsorted arrays. I am loading somewhere a number outside the array into my array. You can reproduce this bug, by running th...

Business logic It would take us too far to explain the whole business case behind this code, so I'll try to be as succinct as possible. There are Persons, and Persons can have Profiles, and the combination of those two is a PersonProfile. There is also a table called ProfilesToReplace, whi...

This is my try on the 99 bottles of beer on the wall lyrics, made in python 3. I am a beginner willing to learn so be gentle :) def lyrics(): if count > 1: print(f"{count} bottles of beer on the wall,") print("") print(f"{count} bottles of beer.") print("") ...

I created a boilerplate from react-boilerplate. I have remove redux and immutable for use context API and immer. I wonder if I use the context API with a good design pattern. I use like this: // ./app/containers/LanguageProvider/index.js import React from 'react'; import PropTypes from 'prop-t...

I've seen this today on a mock interview and wanted to give it a try. I'd love to hear some feedback from you guys. This is my second attempt at the problem, initially I had a mess of if/else towers and nested loops. /* * Write a function that takes two strings s1 and s2 and returns the * lon...

For my game engine I needed a simple templated array class that can be safely passed across module boundaries. It's not supposed to be a replacement for std::vector and thus doesn't need all of its features. Instead it is intended to be used in the interface where binary compatibility is importan...

I have a time series data in long format which looks like as follows: +======+==========+======+======+ | Name | Date | Val1 | Val2 | +======+==========+======+======+ | A | 1/1/2018 | 1 | 2 | +------+----------+------+------+ | B | 1/1/2018 | 2 | 3 | +------+----------+---...

I'm working with directory of raw data csv files, stored daily in a directory with the same name except date stamp in the name, for example "ABCD_20190221_version2.csv". The below function works fine but given that directory 10K files and growing, it's slow. Any idea of how to speed it up? im...

I recently change the code for one of my client's wordpress website and then, it appears that he (my client) wasn't able to reach all of the pages related to the Menu. It appears that he is using the Google App for browser, and has an Ipad. I tried on Chrome, Safari, IE, Firefox, and everythi...

Quite often, I find myself measuring how long some part of my code takes to complete. I normally do that by storing current time using time.time() and then subtracting time after the code is done. This normally gives me a float that I can then format and print for debugging purposes. This is the...

Originally asked in 2nd Monitor If we're asking a second CR question involving the same software, is it acceptable to give it nearly the same title? What is best practice for naming these questions?

This is another review on a program I've asked about before, with a different target in mind. Program Function As before, this program makes emergency changes to medical claim files, delivers all the corrected files analysts need, and produces a changelog as well for their review. Core Pr...

I'm building an IntelliJ Plugin which will allow a person to select an XML file (and even a snippet of XML in the file, if they like) and, using a really brief GUI, generate classes / code in one of a selection of languages that will read the XML via native functions and generate code to do so on...

There is a service class (ProposalPdfService) in one of our assemblies that has implementation logic specific to that app's assembly. Previously (and, I believe, erroneously) I treated it as a quasi-singleton by making it and all its members static, but I refactored it to use the singleton patter...

I am finishing a homework solution and need to print a routine using the .getParent() method and trace back through the routine to all existing nodes to print out a list. How would I go about doing this, the code is as follows: if (nodeSearching == null) System.out.println("No solut...

There is an ongoing discussion with friends regarding the position of the logger. According the clean code static final attributes must locate on top the class. My friend is insisting on to keep like that which is below: public class SomeDummyClass { private static final String PREFIX = "xxx...