Programming Forum

What "Hello World" is to the console, the "Bouncing Ball" is to the Graphical User Interface. Nothing fancy, the ball is created via a call to the API function ellipse() and then bounced within the confines of the windows form. For the DEV C++ crowd: Let me know if you find these snippets somewhat helpful in your learning process in the comments section at the end.

The printer seems to be a much ignored computer peripheral when it comes to programming. This little code snippet explores one way to send text to the default printer. It actually draws the text into an imaginary box on the paper. You can specify the upper left and lower right corners of this box.

Hello everyone, Hope you are doing , I am too much confuse to buy a gaming laptop for my younger brother, Someone suggest a website like https://pcmag.com, https://cartvela.com, and Techradar but there are too much content, I can't make a decision.

I created an html page with days of the week Mon Tue Wed Thu Fri Sat Sun The corresponding page is linked to each day I would need that when the page opens, the day is automatically highlighted based on the day of the week and that there is a bar under the day to highlight it Example: if today is Friday, Fri becomes a different color than on other days I've seen similar things on web pages, but I don't know where to start. Is there anyone who can help me? Thanks

I want to create a webpage which will automatically send an email before 2 days. <form action="try.php" method="post"> <p>Date From : <input type="date" name="date1" /></p> <p>Date To: <input type="date" name="date2" /></p> <input type="submit" name="submit" value="Submit" /> </form> <?php // echo("First name: " . $_POST['firstname'] . "<br />\n"); echo("Last name: " . $_POST['lastname'] . "<br />\n"); $date1Timestamp = strtotime($date1); $date2Timestamp = strtotime($date2); //Calculate the difference. $difference = $date2Timestamp - $date1Timestamp; echo $difference; ?>

Hi everybody, I'm having a little problem with finding sum of nested list in Prolog. So far what I have is [ICODE] totalSum([],0). totalSum([H|T],S):- totalSum(T,Sum), S is Sum + H. totalSum([H|T],S):- totalSum(H,Sum1), totalSum(T,Sum2), S is Sum1+Sum2. [/ICODE] With first two predicates, I have no problems getting sum of not-nested list. Anybody with a tip as to how I can modify the third predicate so that it can handle nested list? I've tried passing off [H] instead of just H and many other but it hasn't worked so far. Any comment would be deeply appreciated.

hi there i have some python coding which i need to convert to java can ne1 help me please email me back if you can help then i will show you the coding much appriciated

Link in MySQL: https://wahlburgers.com/dorchester Variable loaded: $website = $row["website"]; How can I echo the word "Website" as a hot link to $website ( https://wahlburgers.com/dorchester ) inside an HTML form? This is what I've tried: <input type="text" id="website" name="website" value="<?php echo "<a href= '" . $website . "'>" . "Website" . "</a>"; ?> "> Thanks . . .

So, basically what I'm trying to do is a Tic Tac Toe game for a project. I started with making 3 1-D Char Arrays to represent the game's bord. the code below compares the Arrays data to try and figure out if any of the winning possibilites were achieved by option x or y. There is a variable set to 0, this variable will change to 1 if player1 won and will change to 2 if player2 won, if it remains 0 then it's a draw. Now, there's 16 errors of Error C2446 '==': no conversion from 'const char [2]' …

What's the best cloud accounting software for small businesses that handle multiple sales tax rates? Or is there an affordable web-based small business accounting software?

HI , First at all i'm a newbie and sorry if this a dumb question. i want to create a form that only can be submitted once per day by each user, each user has thier own id. My question is how to create a process that will check if the user already submitted and only can be summited on the next day . This is code that i have tried and now working <?php include("../../config/config.php"); $id=$_POST['id_student']; $id_kedai=$_POST['id_kedai']; $now_date_time=date('Y/m/d'); $quer1="SELECT * FROM activity_log where id_user='$id' AND date_create_log = '$now_date_time'"; $quer2=mysqli_query($db_conn_e,$quer1); while ($row= mysqli_fetch_array($quer2)>0){ if($row["date_create_log"] == $now_date_time=date('Y/m/d')){ echo "<script langauge=\"javascript\">alert(\"Data Already …

I am developing an android app for the first time and I wanted to make the sessions for login and logout. I saw that most of the people suggested using SharedPreferences. But how can I check if the user logged out? If the user does not and clicks on my app, then the sign in page won't show up! The user can immediately go to the main page. Here is my java class file where the user id and password would be asked... package example.hiitattendance; import android.os.Bundle; import android.app.Activity; import android.content.Intent; import android.content.SharedPreferences; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import …

Can anyone suggest me which one is a better platform for e commerce website development?

Hi I'm trying to create a script in powershell that finds a string in a file and then modifies it but I'm having issues matching the string I want. So, I'm trying to make sure that I can find this type of string |d where d is is any digit, the string must not be in single or double quotes. SO I'd like to match |1 or |12 or |333 So far this is what I have: `\|[0-9]+` is returning strings with or without single quotes around it, so |1 and also '|5'; `'\|[0-9]'+` returns only strings with single quotes …

I'm struggling to upgrade from [CodeMirror 5.5](https://codemirror.net/) to [CodeMirror 6](https://codemirror.net/6/). Previous versions of CM have always been a drop-in Javascript library. Upload the JS files, upload the CSS file, include a `<script>` tag referencing the JS file, and then use the API to make a bunch of calls to incorporate it into your web app. This latest version of CM is still an early prototype. I'm trying to follow the instructions in its [Github repo](https://github.com/codemirror/codemirror.next/) but I'm thoroughly confused. So far I was able to do `npm run dev` and I'm able to get a test page that works fine …

I just started using python a couple of days ago, so I am a complete beginner. Basically what I am trying to do is the following. Imagine that I have a string variable such as: food = 'bread' I want to create another variable (integer or another type) so that its name is 'bread', in other words the new variable name should be the value of the string variable "food". How can I do such an assignment? My guess is that it should not take more than two or three lines. I read up and am thinking that I need …

Need help with two classes "Cannonball Component" and "Cannonball" I couldn't figure out the code with the rest but. Feel free to look at code check : http://codecheck.it/codecheck/files?repo=bj4fp&problem=ch06/c06_exp_6_16

Hi i'm a beginner in Java. I have school assigment where they want to save employee array to the file and can load it back with replacing the current array in GUI when it hit button save or load. Also, if i want to save or load the array with the specific file name from JTextField what code should i include. import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.awt.event.ActionListener; import java.io.FileOutputStream; import java.util.Scanner; import java.awt.event.ActionEvent; import java.io.*; import javax.swing.JOptionPane; public class Etracker { public static void main(String[] args) { Etracker etk = new Etracker(); Etracker file = new Etracker(); etk.getInput(); …

Hello all I have a form with two datagridviews. Grid A is polulated with orders from DB, grib B has an empty table with the same column name as grid A. Im currently draging orders from Grid A onto grid B. My isue is that since grid B has only one empty row, it only alows to drag one item. What I want to accomplish is to add an empty row in grid B In index 0 (the firsst row) In the dragdrop event I tried to add an empty row, but this code inserts an empty row before the …

Hi When I run main.py I got this error how can I fix it? I'm using https://github.com/PicciMario/iPhone-Backup-Analyzer-2 / Traceback (most recent call last): File "./main.py", line 44, in <module> from PySide import QtCore, QtGui ImportError: No module named PySide I appreciate your help

# What Are Voronoi Diagrams? # Voronoi Diagrams are an essential visualization to have in your toolbox. The diagram’s structure is a data-driven [tessellation](https://en.wikipedia.org/wiki/Tessellation) of a plane and may be colored by random or to add additional information. ## Learn the Lingo ## The set of points that generate the Voronoi diagram are called “seeds” or “generators” for they generate the polygon shapes; in practice, the seeds are your cleaned data. Each seed generates its own polygon called a Voronoi “cell,” and all of 2-dimensional (2D) space is associated with only one cell. A Voronoi cell, or Voronoi “region” denotes …

I have written the following Tkinter script: When I run it, the first thing that happens is the File Dialog box opens without it being called. I am expecting the file dialog box only to open when the "Open Document" button is pressed. import tkinter as tk from tkinter import * from tkinter import filedialog as fd class Application(tk.Frame): def __init__(self, master=None): super().__init__(master) self.master = master self.pack() self.do = PhotoImage(file="do.png") # Document Open self.ea = PhotoImage(file="ea.png") # Exit self.create_widgets() def create_widgets(self): self.opendoc = tk.Button(self, text="Open Document", image=self.do, command=self.openfd()).pack(side="left") self.quit = tk.Button(self, text="Quit", image=self.ea, command=self.master.destroy) self.quit.pack(side="left") def openfd(self): fd.askopenfilenames() if __name__ …

Hello I have created awhile ago in VS2017 an application [application A] with CR sp21 which works fine. Now Ihave another application [application B] created in vs2019 with CR sp29. When I install app B on the same pc where App A is installed the CR wont work so I installed CR runtime sp29 and app B works, but app A returns an error see attach. How can I have both app working. 

Hey guys and gals, any ideas on gaming laptops with good cooling system. Mine just melted ... :/

I 'm building an application to store and retrieve books, but I have an issue with retrieving data from the db. I'm using REST and testing with postman. Everything works OK. Currently I have a series of methods written in Java at the backend like so @Override @POST @Path("/add") //@Produces("application/json") @Produces(MediaType.APPLICATION_JSON) @Consumes(MediaType.APPLICATION_JSON) public Response addBook(Book book) { dbAccess.connectToDb(); return dbAccess.addBook(book); } @Override @DELETE @Path("/{id}/delete") @Produces("application/json") public Response deleteBook(@PathParam("id") int id) { dbAccess.connectToDb(); return dbAccess.deleteBook(id); } @Override @GET @Path("/{id}/get") @Produces("application/json") public Book getBook(@PathParam("id") int id) { dbAccess.connectToDb(); return dbAccess.getBook(id); } So in postman I have a request like http://localhost:8080/book-storage-REST/book/15/get to retrieve …

I tried alot to print this arrow with random generated values which are 0101 , every time it should be differnt, please help me out thanks :)