There's a lot of place in my code where I need to do something like this public static void read(DataInputStream stream) throws IOException { try { Object thing = getById(stream.readInt()); } catch(IllegalArgumentException ex) { throw new IOException(ex); // d...

So I've been learning some basics of python for few moths now. My friend who works as salesman at company, which sales hookahs, asked me if a could write a simple app which would help him maintain a googlesheet which they use as database of products in stock. You can see example of this sheet he...

There's one class named as MainActivity. Does the instantiation of MediaPlayer was done in correct way? As while accessing the fetched song from shared preferences the media player returns null even after null check. public class MainActivity extends AppCompatActivity implements View.OnClickLis...

I have been working on making an 2D game engine in Java from scratch, and it has been going very well, however, the rendering aspect seems to be very inefficient. I have been trying to do it mostly on my own with help from random tutorials and projects that I find when I run into a stump, how...

I am working with PHP5 (Laravel5.1), and I couldn't optimize my function, which takes more 4 minutes turning, and fails in the end when I have a huge data (around 6500rows, but working when i test with around 1000 rows only). Basically, I try to get an array of objects (which contains users with ...

Hi here is my python code: First of all I would like to tell that input (.vcf) file is too large>60 GB of size. So I am reading the .vcf files line by line, but since I have to check for duplicate of two columns present in the input vcf file, I extract those two columns from the input file to a...

Given a list of elements, each with own width, and a max-width. I need to find how many elements can be fit inside that max-width, keeping the order of the elements. some examples: elements: { width: 10 }, { width: 20 } max-width: 30 result count should be 2, because both elements can be fit i...

I'm using an interface IloadPattern on deriving 3 classes from it LinearLoadingPattern , JointsLoadingPattern , AreaLoadingPattern. At some point, I'm creating a list all the objects created from those classes. At a later point, I want to retrieve list of a particular object (JointsLoadingPatte...

I got the following use-case to upload a CSV (~500 Datasets) to provide an object information when it's called to display. Normally I would persist these values to a Database, however multiple users use this application and I think there might be a bottleneck when you repetedly have to call the d...

I'm new here. I'm trying to teach myself programming by learning Python. I have assigned myself the following task. There's a game I'm playing (Rocket Valley Tycoon) where the goal is to basically place an Extractor to gather resources, then use Factories to transform the resource into a good, w...

My aim with the following is to have a way of registering a list of classes, which represent plugins. In the end, I want a boost::hana::set that contains type objects for all plugins' classes. I want everything to be as loosely coupled as possible: Basically, I should be able to just delete a plu...

Why on earth isn't it working?? I want to count the strings in a text file but its always one string too many. f.e when it's 400 strings it says 401... I can't figure out why. #include <iostream> #include <fstream> using namespace std; int main() { string word; int numberofwords=0; ...

So its my first time using Kotlin programming language and for now i am converting old Java code into Kotlin. So for start i took simple function to parse JSONArray from JSONobject with key provided. Here is the code: fun getJSONArrayFromObject(jsonObject: JSONObject, key: String): JSONArray { ...

I am taking the form data using postman but the code is too long is there is any method for getting the data in short form. The code I am using given below:- Struct type Customer struct { FirstName string `json:"first_name" bson:"first_name"` LastName string `json:"last_name" b...

I have all logic below inside one store() method. I thinks it's bad to handle more than one entity in one method (because of SOLID). So logic I have: Part 1: store some Blog data in database (it's only one expression like $blog = Blog::create($request->all())) Part 2: get an image from Req...

I had to sort a list of objects - {name:'name', email:'email} by their keys, ex. by email, so they all be rendered with email key/value pair as a first key/value pair and I was surprised about the solution i came up to - Object.assign() when i loop through array and assign email key/value pair to...

I posted the same question at StackOverflow then I got an advice to post it here. Original question: https://stackoverflow.com/questions/49998297/fast-insert-unique-container I have to store elements (struct State) in a 2D vector container and each element must be unique. I store the elements ...

I've been looking for a while for the right code to encrypt/decrypt files with AES in vb.net. I created the code below. Is this the right way doing AES encryption/decryption nowadays? Public Function EncryptFile(ByVal plainFilePath As String, ByVal encryptedFilePath As String, ByVal EncryptionKe...

Here is an attempt I made at a simple Substitution based cipher machine, it shifts input characters by an amount then returns an unreadable string which can then be decrypted back to its original self: package Pack; import java.io.UnsupportedEncodingException; import java.util.Arrays; import ja...

I am using eager loading. My problem that I am having is that when using (Auto.Mapper 4.1.1) Mapper.DynamicMap the method is going back to sql server for each relationship. It's taking about 2 minutes to finish mapping. How do I only retrieve the data from sql one time. Here my code. Lab...

I'm asking in arbitrary sense to avoid going into any unwanted specifics. Suppose we're to put balls in baskets. If the there are <6 balls, they don't get to go in any basket. If there are between 6-12 balls they take up 1 basket. But if the balls are >12, they take up 2 baskets. Following is W...

INPUTS: integer: unitsSold PROCESSING: Calculate discount based on unitsSold; keep track of which discounts have been applied, and how many times; create an output file containing all of this information. DESCRIPTION: There are three files, one has methods for finding the discount and price ...

I'm writing a mechanism to retry any failed downloads that respond with certain http error codes, I've noticed the server I'm downloading from will unexpectedly throw these codes to me and when I manually visit the URL it appears to be fine. It also seems that its fine when trying to download fo...

I have a program which finds a string Q in string P at its first n characters and prints out a number of "operations aka. rules" used to find a match in P (this is based on min. edit distance algo). A special thing about string Q is that it was created using a set of rules: aa -> aaa abac -> ab...

This is a random access iterator that stores an index and a reference to a container. It iterates over any container with indexing operation. It does not have copy assignment / move assignment operations. This is because I cannot re-assign the reference to a container to reference to another co...

So I'm working on a sort of distributed build system. The system allows execution of snippets of scripts as build steps. I need to be able to hash these snippets of code in a way that comments and doc strings don't affect the hash. I'm getting part way there by using the ast module to parse the c...

I recently coded a game of hangman and wanted to know, A: Are there any places it could be more efficient. B: Are there any things that are distinctly wrong with it since I know people seem to say to avoid using GOTO and SLEEP. C: Is there a way to have it generate words randomly or a database...

A lot of institutions need systems to manage their works, so this project is going to be registration system which gives universities the abilities to manage their registration operations. so, you have the main objects : 1. Student 2. Teacher 3...

Our company consumes a lot of telemetered data from sensors which we consume via an api. So I wrote a method to consume them a bit easier for internal applications. I didn't add a generic to the method, mostly because Json.Net didn't always build the object correctly. I'd like to remedy that i...

I have been working on creating my own implementation of an RBAC system for the purpose of: learning to use an OOP approach instead of procedural switch from using mysqli to PDO and to learn how to use dependency injection DB Connect File: <?php $config = include '../config.file.php'; try {...

I'm getting an error on line 3 saying this "Parse error: syntax error, unexpected '$dbLocation' (T_VARIABLE), expecting identifier (T_STRING) in /Applications/XAMPP/xamppfiles/htdocs/Website/db_const.php on line 3" <?php # mysql db constants DB_HOST, DB_USER, DB_PASS, DB_NAME const $dbLocation= ...

Write the C++ program that implement and print the results of the Red Black tree after inserting the following nodes {122, 110, 130, 113,160}

<!DOCTYPE html> <html> <body> <title>Javascript Task 3</title> <h1>JavaScript Task 3</h1> <button onclick="changeImage()">Change Lights</button> <img id="Image" src="red.JPEG" width="150px" height="300px"> <script> function changeImage() { var image = document.getE...

I've been working on a personal project for a while which simply extracts some information from a website and save them as JSON files. Then I've decided to move those scraping functionalities to the server and write simple js application which sends GET requests to extract that information. Befo...

After implementing some logging in my system, I got tired of digging through very long files trying to determine where specific runs started/stopped to look for differences, so I began adding a date/time stamp to the file name so I'd get a new log file each time the processing kicked off. This wa...

I have a method which allows to create user account.It contains some conditions to control empty fields,wrong format of email ,weak password...etc. errorSet = false; @FXML private void createAccount() throws IOException { if (!lastNameField.getText().isEmpty() && !firstNameFi...

I know this question has been asked here many times regarding long run times (my problem) but I don't understand the explanations so here is my take; def euler_12(num): i = 0 for n in range(1,num): list= [] for j in range(1, n**2): if (n+i) % j == 0: ...

I have just attended a code test of some code testing site, and I think one question seems easy but I didn't get a high correctness (57%), so if anyone can review this code snippet, I would be appreciated. In summary: given an array A, with dimension N, 1<=N<=100000, A[N] within range of [-10000...