280 Tutorial Topics
Remove Filter  | |
 | ## Introduction ## Java 14 was released with a new type of expression called Switch Expression. Its syntax is similar to that of the Switch Statement, with a few differences. In this tutorial, we will walk through concepts related to the Switch Expression and learn how to use it. ## … |
| | ## Introduction ## In this tutorial, we are going to learn how to create a Java module by hand. ## Goals ## At the end of this tutorial, you would have learned: 1. What a `module-info.java` file is. 2. How to compile a module. 3. Describing a module. ## Prerequisite … |
| | ## Introduction ## This tutorial introduces the `CyclicBarrier` class and teaches you how to use it. ## Goals ## At the end of this tutorial, you would have learned: 1. How to use `CyclicBarrier` to synchronize tasks across multiple threads. ## Prerequisite Knowledge ## 1. Intermediate Java. 2. Basic knowledge … |
| | ## Introduction ## `partitioningBy()` collects a `Stream` into a `Map`. In this tutorial, we will compare the two different `partitioningBy` methods and learn how to use them. ## Goals ## At the end of this tutorial, you would have learned: 1. What `Collectors.partitioningBy` does and how to use it. ## … |
| | ## Introduction ## Based on the 2020 Java Ecosystem survey from Jetbrains, 75% of Java developers are still using JDK 8. JDK 11 introduces `HttpClient`, which replaces the legacy `HttpURLConnection` API. For this tutorial, we will build a `HttpClient` that consumes the free Cat Facts API. ## Goals ## At …  |
| | ## Introduction ## This tutorial teaches you how to implement the Type-safe Builder pattern using Kotlin. This pattern allows developers to create declarative and concise DSLs. Our implementation will be a Burger Builder that enables our users to create Burger objects expressively. ## Goals ## At the end of the … |
| | ## Introduction ## This tutorial teaches you how to create a Spring Boot application that provides RESTful API Endpoints. These endpoints are best consumed by other applications or for integrating with a SPA (Single Page Application) frontend such as Angular. For the purpose of this tutorial, we will create a … |
 | # 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 … |
 | [ATTACH=RIGHT]20145[/ATTACH][B]Building your first DYNAMIC Database application. This is Part One of a four part tutorial on how to install and use your database, Part Two will teach you how to build successful connections and Part Three will teach you how to build database interaction and management of your databases.[/B] There … |
 | ###Subclassing python objects Sometimes you want to add just a little more functionality to an existing python object. You can do that by subclassing it and adding on the missing parts. This example is based on a really mindless game of solitaire I used to play as a kid. In … |
| | Python-wxPython Tutorial This tutorial will take you through the basics of wxPython. ##Introduction: Let's face it. I am a dinosaur. I got my computer science degree in the mid 70s. And it won't be long before **I** am in **my** mid 70s. So why am I trying to learn Python? … |
| | Are you a developer looking to improve your WordPress skill set by including WordPress and Bootstrap development together? Well, you’re in the right place. The following is a guide that helps you integrate Bootstrap, a powerful front-end development framework with the world’s most popular CMS, WordPress. For this article, we … |
| | # Introduction # This tutorial provides guidance on gathering data through web-scraping. However, to demonstrate the real-life issues with acquiring data, a deep-dive into a specific, complicated example is needed. The problem chosen, acquiring the geographic coordinates of gas stations in a region, turns into an interesting math problem that, … |
| | ## Intro ## Receiver Operating Characteristic (ROC) plots are useful for visualizing a predictive model’s effectiveness. This tutorial explains how to code ROC plots in Python from scratch. ## Data Preparation & Motivation ## We’re going to use the breast cancer dataset from sklearn’s sample datasets. It is an accessible, … |
| | vb.net 2010 Windows Pro 7 ## Create a Video Library with an Embedded Windows Media Player ## I have close to 400 video clips in my home movie library. In order to quickly locate any given video I have added certain words into the file names. Even so, locating specific … |
 | Yes, you've been told it's dead, gone and to move off this old beast of a system from 1998 but here you are, tasked with fixing an old legacy app so let me share that I've been there and how I got around some of the issues. These are: 1. …  |
 | Hi guys! i think this is usefull, a lot of the users have problems with .Net Framework installation, Error code: HRESULT 0xc8000222 Do these to solve: a: Click Start > Run. b: Type cmd and press Enter. Please run the following command in the opened window. net stop WuAuServ c: … |
| | [B]Intro[/B] This tutorial provides a brief introduction to the random number functions that come as part of the C++ standard library, namely rand() and srand(). [b]rand() and RAND_MAX [/b] The C++ standard library includes a pseudo random number generator for generating random numbers. In order to use it we need … |
 | What has Schrodinger got to do with the complex and paradoxical concept of quantum computing? The answer is that both Erwin and his hypothetical cat relate directly to this subatomic world. In fact, Schrodinger is often referred to as the father of quantum mechanics. ## Erwin who? ## [Erwin Schrodinger](https://en.wikipedia.org/wiki/Erwin_Schr%C3%B6dinger) …  |
 | Last night, a friend mentioned to me that one day he was trying to fetch a random 5 rows from a MySQL database. He researched online, and was eventually presented with a working solution in which he would generate five random numbers. Then, he would query the database for items …  |
 | Have you ever wanted to develop a math parser and evaluator? Are you in such a quandary or just have curiosity or interest in the matter? If so, you may download the complete source version 8.3.48 or later, but be warned there is almost no comment; or instead, follow versions …  |
| | **Introduction** Today we are going to go over the very basics of web design and getting it right. I see a lot of web developers who say they are programmers but not designers (although sometimes I wonder even this.) However, this shouldn't mean you can't get the very basics of …  |
 | Making sites is nice and fun but what if you don't want everybody too see something like an admin panel or maybe a special button. Well this tutorial helps you understand how to add a password to a php site in a simple manner. There are two techniques you can … |
| | Sometimes there are functions you want your program to perform in the background while you are busy doing other things. For example, if you are building a picture viewer application you may not want to wait until thumbnails are generated before getting on with the business of viewing the pictures. … |
 | # MySQL Stored Routines: Another Useful Scenario # [In a past guide](http://blog.bobbyhensley.com/sql-procedures-functions-authentication-example/) I discussed MySQL stored routines within MySQL. Now I’m back with another guide on MySQL stored routines. And this time it’s a more concrete case; one that you may run into yourself in the future (or maybe you … |
 | This is a continuation of our basic tutorial on MVC Framework. In this section, we will be creating the template files for both the TBS and the Smarty template engines. **The recap** In [part one](http://www.daniweb.com/web-development/php/tutorials/476695/part-one-php-mvc-framework-understanding-the-basics), we have created application controllers, models, and the one and only lone View class. Once … |
 | Although objects collections have a place in the PHP world many years now , their use is now flourishing because more and more PHP programmers turn to OOP. This tutorial is a sequel of https://www.daniweb.com/programming/web-development/tutorials/500118/a-simple-data-layer-for-oop-php-applications (we will refer to it as “previous tutorial”) and https://www.daniweb.com/programming/web-development/tutorials/500118/a-simple-data-layer-for-oop-php-applications , in order to understand … |
| | Hello, This tutorial is the next of “[A simple Data Layer for OOP PHP Applications](https://www.daniweb.com/programming/web-development/tutorials/500118/a-simple-data-layer-for-oop-php-applications)” so having read it and made your own tests is needed to understanding what we are doing. So far we have a Db object (child of PDO that standardize and simplifies its use) , a … |
| | A simple Data Layer for OOP PHP Applications Hello, first of all to understand this tutorial would be best if you have some knowledges about OOP ( https://www.daniweb.com/programming/web-development/tutorials/437592/introduction-to-phps-object-orientation by priteas ) and DB usage (MySQL in this case) with PHP https://www.daniweb.com/programming/web-development/threads/499320/common-issues-with-mysql-and-php by diafol ). What we will try to achieve … |
| | ## Contents ## Overview 1. Alternatives to Deprecated mysql_* Functions 2. SQL Injection: What to do with $_POST and $_GET variables 3. How to Insert Tablenames and Fieldnames Properly 4. What to do With Dynamic Values? 5. How to Use Aggregate Functions (COUNT, SUM, MIN etc) 6. How to Paginate …  |
 | Note: In Python 2.7 use: `from __future__ import print_function` to use examples. In Python, by default, the key and value pairs in a dictionary are stored as hashes, therefore dictionaries do not retain the order in which values were added, and cannot be ordered. v_Dict ={} v_Dict["First"] = 99 v_Dict["Second"] … |
 | PHP is an object-oriented language, based (loosly) upon C++. It has classes, methods, member variables, and all that other good stuff. It runs on your web server, not in the client, but the HTML, JavaScript, and other stuff such as CSS blocks that it emits with its output commands are … |
| | User input/output is a key component in the programs you write, yet most online tutorials just provide a quick-and-dirty method of grabbing data. In other words, it works right up until the point the user does something unexpected. In this tutorial you will learn how to avoid the common mistakes … |
| | !USING PYTHON 3.1! Hello DaniWeb! Today I'm going to teach you a cool variable trick that I learned. So here's an example: [CODE] a, b, c = input('?x?x?: ').split('x') [/CODE] Now let's input something like: [CODE] >>> a, b, c = input('?x?x?: ').split('x') ?x?x?: 1x2x3 [/CODE] Now, variable 'a' is … |
 | Recently I've stumbled on a nice tool that I really quite like, so I thought I'd share it: Personally, I love the power behind PHP. I find it a very simple to use yet possesses the techniques seen in the more complex desktop applications such as Perl/Python/C/C++/C# etc. PHP has …  |
| | This tutorial is intended for people who are looking for alternative to PHP template engines like smarty, twig, dwoo, TBS, and others. Not all developers are willing to take the extra efforts needed to learn the template engine syntax. Some are just left behind thinking that PHP is a template … |
| | # SEO URL Redirection Basics: TUTORIAL # First you can see/get/use some code here. <?php /** * Redirect the visitor to another URL using a proper status code. * * @param string $URL * @param int $StatusCode * @copyright Claude "CodeAngry" Adrian * @license http://www.wtfpl.net/ */ function RedirectURL($URL = null, … |
| | **Modifications Required for VB6 Applications to Work on Vista/7** Thanks to Hassan Basri in VBForums **Application Changes** - Remove SendKeys calls and replace them with API code. - Use the HKEY_CURRENT_USER in the registry for the settings of your application. - Do not write to HKEY_LOCAL_MACHINE. - If you are … |
| | Wouldn't it be nice to have a sizable command button in VB6? Face it. In the hidden recesses of your mind you have always wanted to be able to resize that command button in VB6--after the program is running that is. It's just that VB6 has not provided you with … |
 | Oh No, not another LockBits demo. Well hopefully this demo may also give you a little in site into actually playing with, and calculating some simple effects as well as understanding the advantages of LockBits as apposed to GetPixel and SetPixel. # A Useful Note. # It is important to … |
| | I will be showing how to pass data between two forms in VB .NET. I will be using two forms, two classes which we will define, a delegate, an event, and an event handler. It is my first tutorial and is a bit long because I wanted to make it … |
 | # Introduction # A recurring problem many newcomers face when tackling C++ is the compilation process, from sources to binaries. This tutorial will detail that process. It will be especially useful for people only familiar with higher-level languages (if any), but veterans of one or more native languages (C, Fortran, … |
 | # Performing Selective Includes in Entity Framework with the Fluent API # When we are using Entity Framework as our data access choice to work with SQL Server then there are some potential pitfalls. One of these pitfalls is doing selective includes. What do I mean by selective includes? To … |
| | Yesterday i completed my exercises on loop , that's why today i've decided to create a tutorial on loop in c++. # Loop # loop allows us to repeat a statement or a group of statements. When we want to repeat a single statement then it is not necessary to … |
| | **Problems 1: Spiral matrix - Advanced** Source of the problem: [Here (not in English)](http://www.spoj.com/PTIT/problems/BCACM11B/) Spiral matrix is formed by filling number 1 in 1st row 1st column, after that, filling with increasing number by clockwise, example: 1 2 3 4 5 16 17 18 19 6 15 24 25 20 …  |
| | This tutorial is the first time I write about coding techniques for improving the performance of software. This is going to be a step-by-step journey through a real example, with real benchmark results at every step so that you can see the effect of the different optimization techniques. And as …  |
| | As usual, after learning new stuff, I write on it. Yesterday I finished learning on "Functions in C++" and found that functions are very easy to learn and useful. Hope this tutorial helps beginners. # What is function? # Sometimes when we want to execute a specific task wherever it's … |
| | This tutorial is designed to get someone started with D that hasn't used it yet, it assumes you have some type of programming experience. # What is D? # In one sentence (from [dlang.org](http://dlang.org)) *"D is a language with C-like syntax and static typing. It pragmatically combines efficiency, control, and …  |
 | File I/O With C++ Fstream **Intro** File handling is as simple as writing in a book, much easier to modify and find. It's so simple people get confused with it :-). Welcome to the world of file handling. We will use the c++ fstream classes to do our file handling. … |
| | Here's a simple tutorial on dictionaries in Python: Dictionaries: Dictionaries are similar to other compound types except that they can use any immutable type as an index. One way to create a dictionary is to start with the empty dictionary and add items. The empty dictionary is denoted {}: [CODE]end2sp … |
The End.