I am trying to implement algorithms related to trees in Scala. I have dabbled with the following implementations of a tree. Are there any pros and cons of preferring the non-Option related implementation over the one that uses Option Implementation with Option sealed trait Node { val labe...

I am working my way through "Cracking the coding interview" problems and have finished implementing this question: "Given, two strings, write a method to decide if one is a premutation of the other". Can anyone give me any feedback on my implementation in regards of efficiency or improvements? p...

The following code implements a simple interface to operate on mutable* Strings in C. It is composed of two files: one for the structure definition and the available operations, and the other with the actual implementation. *This can be inexact, as only adding characters to the end is implemente...

The output of this code should be the arraylist words and the toString that you will see below, but it is just “file.txt” in the form of a String. I really can't understand why this is happening could someone please explain a correct way to get the output that I have described above using the cli...

I have been using the Excel XML Import feature in the developer tab. My XML files have over 200 elements nodes and I have mapped 182 of them into the sheet (schema). However, when importing 50 XML files, it takes roughly 7 minutes. I then use a Macro to format the data to the way I want. When I ...

I am new to python and recently started exploring web crawling. The code below parses the S&P 500 List Wikipedia page and writes the data of a specific table into a database. While this script is hardcoded and I would certainly be interested in some thoughts on performing the same task in a sli...

I have created simple algorithm to generate the new Location from given latitude and longitude. // How to use : first call SetupLocation(InputLat,InputLon float64) to set base latitude and longitude. // To genreate the location you can call RandomLatLong() to generate using seconds degree. // A...

Can we use aws mobile hub for authentication and integrate asp.net web api for other business logic is it a good design ? I want to use sql server instead of dynamodb also i am not very fimiliar with lambda functions. Any suggestiosn

as a rookie I have couple questions regards code I've written. It's a part of code where two Threads ("priests") talk to each other. One asks and waits for the second to answer - then something happens depending on what has been answered by second thread. I have two simple questions: 1. Regards s...

I basically want to write a simple gui program to sync to directories using the unix shell rsync. The core part of the code is below. My main question is, do I need to have the waitFor method included? At present, I have left it out, because I would like to show the user the --progress responses ...

can you reviwe this code for me? how do i make it better? //this is the calculator import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.util.*; class dog extends JFrame { private JButton n1, n2, n3, n4, n5, n6, n7, n8, n9, n0, add, sub, mul, div, slo, cls; priv...

I've came across this code on the interwebs but i don't realy understand it (except main) and I'm loathe to use code i don't understand, would anyone be willing to go over and add some quick comments to help me a bit? import java.util.*; public class Board { public static void main(String[] a...

My job is to find the largest repeating substring in a given string, which repeats to re-create the entire string. For example, if input="cdcdcdcd" then the longest pattern would be "cdcd". If no substring can meet this requirement, return -1. Apparently the best possible time for this is 0(n), b...

For an FASM assembly course I've to do the following exercise: "Write a program that takes the number n as input. Then it prints all the numbers x below n that have exactly 2 different integral divisors (Besides 1 and x). For example: 15 is such a number. It is divisible by 1,3,5,15. (Here 3 an...

i have this function that returns me list of users with their roles and groups, as you can see this is how i fetch and create list of objects, i'm wondering is this good approach and is there something that i could improve, i'm not that experienced with PHP so i would appreciate code samples. Als...

Now I know the same type of question (same task) has been asked on this site before, but I recently wrote my C++ implementation of the Hack Assembler from the Nand2Tetris Chapter 6 course (defined here). I'm not really looking for tips on solving the task itself, although these are appreciated as...

I've written a queue supporting one producer and multiple consumer threads. Idea is that the queue instances a definable number of long running comsumer threads. Internally I'm using a BlockingCollection to solve the producer consumer problem. I've done some little testing via a console applicati...

I have written my own object pool class called ObjectPool<T> which uses SpinLock and Stack<T> public class ObjectPool<T> where T : class { private int _size; private Func<T> _factory; private SpinLock _spinLock; // Storage for the pool objects. The first item is stored in a dedi...

I have a single class - App.java, with another class that I have imported from a library inside of my project - AnotherClass.java. The project is a very simple calculation tool that takes user input (I/O) and runs from file if one is given. My question is to ask whether there is a better way to ...

Working with futures and .then, I keep running into the problem of needing to "capture by move" in a lambda. In fact, not only that, but when implementing e.g. when_all, I find myself needing to capture a whole parameter-pack. Neither of these things are supported out of the box in C++17. Howeve...

I am new to Code Hunt. There is one problem that I am trying to solve for hours but couldn't succeed. Sample Testcases Input: 3 691 779 947 11 170 368 472 298 22 150 370 1061 162 1073 491 Sample Testcases Output: 779 691 947 22 368 370 1073 162 298 472 1061 491 150 170 I understand that first...

I'm working through Algorithms Cormen et al to learn more about algorithms and modern C++. I've implemented the maximum subarray problem and would like some feedback. I'd really like to use the modern additions to C++ effectively, so please let me know where things can be improved. One of my...

Imagine you are given this polynomial x + 2x^2 and you want to subtract it by 2. How can you do this using the operator minus overloading ? My guess would be: Polynomial Polynomial::operator-(Polynomial object1, double constant){ object1[0]-= constant; return object1; } Note: I am...

Common Lisp does not have a generic copy function for reasons outlined in Kent Pitman's article The Best of Intentions. However, it may still be convenient for rapid prototyping purposes to provide such a function that would recursively copy any given lisp object down to its immutable core object...

Im trying to read the users input from the command box of my program and based on what the user enters into this command box the program should output appropriate messages. For example when the user enters quit the program is supposed to stop and I have implemented this correctly. SO what I am tr...

I read that, in HTML, it is better to display non-tabular data using the <div> tag instead of the <table> tag. I have a website that is displaying a lot of things as tables, because I like the look of it. Here's what it looks like: Screenshot And here is the table code: <table> HTML <!-- **...

Overview The following code is a solution for a Project Euler+ problem on Hackerrank. A circular prime is a prime number whose rotations are also prime. For example, 197 is a circular prime since it and all it's rotations (197, 971, 719) are prime. The sum of all circular primes less than 100 i...

I recently bought a 4x4 keypad. It is one like this: http://www.learningaboutelectronics.com/images/4x4-matrix-keypad-pinout.png Now every code I found on the net was either using a highly overloaded library or was poorly hacked by a guy in the arduino forums. I realized that almost all blogs ab...

My code only show the height of all tree but i m lost with print all height nodes. //method in class Nodo public Integer eachNodeHeight(){ if(this.left == null && this.right == null){ return 0; } if(this.left != null && this.right != null){ if(this.left.eachNodeHeig...