Click here to Skip to main content

Submit your article

Objective C

Objective-C

Great Reads

Guide to WIN32 Regions

by Paul M Watt

Guide to understanding how to create and use regions with the WIN32 SDK

Create An Awesome WPF UI for Your C++/QT Applications

by The Ænema

This article will teach you how to create an amazing, clean and smooth WPF/Winform UI for your native application without using any complex, unsafe, ActiveXish methods, etc.

Using C Calling Convention Callback Functions in C# and VB - The Easy Way

by Jecho Jekov

Provides an easy way to use C calling convention callback functions in C# and VB

CppEvent - How to Implement Events using Standard C++

by Shmuel Zang

This article shows how we can implement a thread-safe events (similar to .NET events) mechanism using the standard C++ library.

Latest Articles

Customize List View Column Headers

by Javad Taheri (drjackool)

Show or hide, reorder, save and restore list view column headers

Universal implementation of BFS, DFS, Dijkstra and A-Star algorithms

by optiklab1

I demonstrate with an actual implementation that well-known algorithms BFS, DFS, Dijkstra, and A-Star are essentially variations of the same algorithm.

Converting between NSString and C Strings in an iOS Project

by ToughDev

How to convert between NSString and C strings in iOS project

Faster than STL

by Ben McNamara

Container classes much faster than STL.

All Articles

Objective C

Customize List View Column Headers

20 Sep 2023 by Javad Taheri (drjackool)

Show or hide, reorder, save and restore list view column headers

Universal implementation of BFS, DFS, Dijkstra and A-Star algorithms

15 Sep 2023 by optiklab1

I demonstrate with an actual implementation that well-known algorithms BFS, DFS, Dijkstra, and A-Star are essentially variations of the same algorithm.

Error in wireguard-Apple --> building and integrate for iOS and macos

13 Sep 2023 by Pravin TS

I am trying to integrate WireGuard for iOS and macOS in Xcode, the build process is success, but the integration shows error,although I had followed the procedures said in...

How to convert datagridview to class object?

19 Aug 2023 by headshot9x

I have a class object and the Datagridview. I want to convert data in Datagridview to object, and can get/set values in object. Assume the quantity element in Datagridview equal to field of object, and variable name like the name first of...

How to convert datagridview to class object?

19 Aug 2023 by OriginalGriff

Bear in mind that your processing is in a loop: so if your DGV has multiple persons, only the the last will be used - the earlier data will be discarded. You can't access _person in your button click handler: it is local to the GridviewToObject...

Priority queue with classes

28 Jun 2023 by Quinten Bakker (QB)

I am trying to use priority queue with custom classen. My class is node(name, .., .., distance, ...) but when in try to push a node into the queue i get a error. node a = node("a",{}, 0, &a); node b = node("b",{}, INT_MAX, &a); node c =...

Priority queue with classes

28 Jun 2023 by Rick York

Another option is to implement a comparison method in your class specifically for the purpose of sorting. It has to be static since sort does not pass this pointer to it. You could also make a sort method that could also be static but...

Sort a vector of classes

28 Jun 2023 by Quinten Bakker (QB)

So I have a class node(name, vector, distance, prev) and i want to sort it by distance. And i have used some methods like sort or with a operator but nothing seems to work. Is there any other way to to sort a vector of classes? What I have...

Sort a vector of classes

28 Jun 2023 by Richard MacCutchan

I have simplified your node class and the following code builds and runs using Microsoft C++ compiler: #include #include #include #include class node{ public: std::string name; int...

Priority queue with classes

28 Jun 2023 by k5054

Similar to your previous question, a priority_queue needs to know how to determine which object has the higher priority. You could add a custom comparator to the definition of the priority_queue, or you could add an operator

Priority queue with classes

28 Jun 2023 by Richard MacCutchan

std::vector test = {&a, &b, &c, &d}; // test contains node pointers node* shortestNode; std::priority_queue q; // priority_queue is declared to contain nodes rather than pointers to for(auto i : test)( q.push(i)...

Sort a vector of classes

28 Jun 2023 by k5054

I added a main function the above code vis: // .. QB's code up to here #include int main() { vector test; sort( test.begin(), test.end(), [](const node &a, const node &b){ return (a.distanceToStart

Converting between NSString and C Strings in an iOS Project

8 May 2023 by ToughDev

How to convert between NSString and C strings in iOS project

Faster than STL

22 Apr 2023 by Ben McNamara

Container classes much faster than STL.

Handling NSInvalidArgumentException “Pushing the same view controller instance more than once is not supported” in an iOS Application

5 Apr 2023 by Tough Developer

How to handle NSInvalidArgumentException in an iOS app

FAT-32 Sorter - Utility that Sorts the Files' Table in the FAT32 File System

12 Feb 2023 by Udi Cohen

How I wrote a utility to sort files in FAT-32 storage devices and fixing products that are affected by improper sorting order, such as various music players.

VB .NET/WinForms: Create Form's MainMenu by Load Menu from Resource-Only DLL

5 Jan 2023 by vblover Programmer

Load Menu from Resource-Only DLL (created by VC++) and Set for Form As MainMenu by API Functions.

Fast 2:1 Image Shrink (Scale Down)

16 Nov 2022 by Svetoslav Chekanov

Fast implementation of 2:1 image shrink (full image or part of it)

Handle Managed(C#) Event in Managed(C++/CLI)

10 Oct 2022 by Mehul Donga

Handle managed (C#) event in managed (C++/CLI)

Storage Device Restriction Using a Minifilter Driver Approach

11 Sep 2022 by Rahul Dev Tripathi

The fully working sample code explains everything necessary to create a Minifilter driver to block devices connected through an interface.

Integer Factorization: Dreaded List of Primes

20 Aug 2022 by Patrice T

Using a large list of primes with Trial Division algorithm and how to handle the list

An Efficient String to Unsigned int ID Struct

22 Jun 2022 by Stephane Capo

C++ optimization for map using string key among others

ESP32 WEB Server with Asynchronous Technology and Internal File System

16 Jun 2022 by Member 4206974

A work for exploring the Asynchronous WEB Server, the SPIFFS File system and the exploitation of the dual core

mscript - Version 2.0 Adds Error Handling, New Functions, and DLL Integration

2 Apr 2022 by Michael Sydney Balloni

If you were on the fence about adding mscript to your arsenal of system tools, have another look.

reuse: An Object Recycling C++ Class Library

23 Feb 2022 by Michael Sydney Balloni

Recycle objects that are expensive to create and improve the performance of your application

Always displaying "Buddy Name, " in iMessage via my iOS app

22 Jan 2022 by Member 15509240

Hi, I saw your query, and in my husband iPhone 13 pro phone I always keep seeing last mms(in iMessage)sent to “buddy name” but there is no contact exist with that name. Can u help?

securelocker: an httplite "pretty secure" file storage locker

8 Jan 2022 by Michael Sydney Balloni

An exciting proof-of-concept that sews httplite with security components

We Make a std::shared_mutex 10 Times Faster

16 Dec 2021 by AlexeyAB

Atomic operations and C++11 memory barriers and assembler instructions generated on x86_64 CPUs

multi-threading

State Machine Framework in C

30 Nov 2021 by Nandkishor Biradar

A minimalist UML State machine framework for finite state machine and hierarchical state machine in C

Win32:C++ Add Icon to Right Side of Button Text

21 Nov 2021 by REALTBU

Easy to use class which supports displaying icons on button controls

Init Threads in MFC and Win32

17 Oct 2021 by Petrov Vladimir

Starting Threads in MFC and Win32 and some handling samples

multi-threading

OOPS : valueerror: invalid literal for int() with base 10

10 Sep 2021 by Priyanka Somani

Given as input a list of integers nums and an integer k, return the maximum value of each sub-list of length k Example: nums = [4, 8, 2, 4, 10, 12] k = 2 Output = [8, 8, 4, 10, 12] Your task is to create a class named SlidingWindow and implement...

So You've Got 10M Particles to Simulate

8 Sep 2021 by Michael Sydney Balloni

Performance of data structures in C++ vs. C#

Objective C : how do I find the url of a current webpage from sfsafariviewcontroller?

31 Aug 2021 by Member 14307648

Hello Using Objective C, I'm creating an app that initially loads Safari. The landing page is something like www.mypage.com. When a user click on a button, in Safari, it redirects them to a new page something called, www.anotherpage.com. Is...

Fast Typo-Insensitive String Matching in a Program and a Database

12 Jul 2021 by David Wincelberg

Strings that differ by typos can be matched.

Objective oriented programming

1 Jul 2021 by Richard MacCutchan

void getarea(double *X, double *Y,int Node_0, int Node_1, int Node_2) { double element_area= abs(0.5*(((x[node_0] - x[node_2])*(y[node_1] - y[node_2])) - ((y[node_0] - y[node_2])*(x[node_1] - (x[node_2]))))); } You calculate some value and...

Objective oriented programming

1 Jul 2021 by KarstenK

The most common reason is that your code doesnt work as want, some people call it bug but often are it only some missing code pieces. To examine your code most IDE have a tool named "Debugger". Read this Debugger tutorial to kickstart your...

Objective oriented programming

1 Jul 2021 by OriginalGriff

"It doesn't work" is probably the most useless problem report we get - and we get it a lot. It tells us nothing about what is happening, or when it happens. So tell us what it is doing that you didn't expect, or not doing that you did. Tell us...

Text to SVG Path Utility in U++

22 Jun 2021 by Miroslav Fidler

Creating a simple utility for converting text to SVG path in U++

Power Reduction and Wake Up Techniques on ESP32 Board

4 Jun 2021 by Member 4206974

A C++ script with functions for managing the power reduction and wake up techniques on ESP32 board

Stern-Brocot Trees and their Applications

1 May 2021 by Mircea Neacsu

A data structure for finding best rational approximations

Write a function f where f(f(x)) = -x

15 Apr 2021 by Arvind Patel Apr2021

Write a function f where f(f(x)) = -x (assume x to be an integer), any programming language would do. What I have tried: How can I write the following fuction?

Write a function f where f(f(x)) = -x

15 Apr 2021 by OriginalGriff

We are more than willing to help those that are stuck: but that doesn't mean that we are here to do it all for you! We can't do all the work, you are either getting paid for this, or it's part of your grades and it wouldn't be at all fair for us...

Write a function f where f(f(x)) = -x

15 Apr 2021 by CPallini

You know, you may accomplish this task using a function returning the complex number obtained multiplying x by sqrt(-1). Using other approaches you have to return, together with the integer result, and additional info. There are several ways to...

Connect ESP32 Board via Browser

7 Apr 2021 by Member 4206974

Board based automation and environment control

Call Distribution Parameters using Combined Data Points Splicing

31 Mar 2021 by Fedor Naumenko

Find type of distribution and parameters from set of distributed physical values

Fun with YouTube Data API v3 (Public Data) and Kigs Framework

25 Feb 2021 by Stephane Capo

Kigs framework C++ Windows project to retrieve and display what other channels are subscribed by subscribers of a given YouTube channel.

A Basic Icon Editor Running on ReactOS (and Consequently on Windows XP and Newer Versions)

31 Jan 2021 by Steffen Ploetz

Creation of a basic icon editor with as little code as possible, that is running on ReactOS and Windows, to check out the stability of application development capabilities on ReactOS

Dynamic Logging

12 Jan 2021 by Alexander Schichmanter

Concept, Motivation and Implementation of Dynamic Logging - a valuable aid to the C++ programmer

Always displaying "Buddy Name, " in iMessage via my iOS app

11 Jan 2021 by Md Sadham

DESIGN: In my app, am using iMessage post option. Its works perfectly with one silly problem. Here is my code:if(!TARGET_IPHONE_SIMULATOR){ if ([MFMessageComposeViewController canSendText]){ MFMessageComposeViewController *MFMsgPicker = [[MFMessageComposeViewController...

How to Iterate Over the Parametric Curve

29 Dec 2020 by IgorRadionyuk

An iterator over parametric function, which is a well known mathematical abstraction: Parametric Function. It maps interval of real numbers[start, stop] to some values in the range of function.

Value Ranges or Diapasons

26 Dec 2020 by IgorRadionyuk

Proposal for implementation diapasons of values or it ranges

Data-Driven Model Predictive Controller (MPC) in Simulink Matlab

18 Oct 2020 by Roozbeh Abolpour

The data-driven MPC is implemented in this project that can be easily exploited

Arduino Scheduler

16 Sep 2020 by Member 4206974

A function that works on event of Arduino and ESP32 boards

[Help] convert Obj-C to C#

9 Sep 2020 by wooriele

- (float) getVerticalOffset:(CGPoint)point1 point2:(CGPoint)point2 point3:(CGPoint)point3 point4:(CGPoint)point4 magnetLen:(float)length{ float result = length; if (point1.x > point2.x){ float t = point1.x; point1.x = point2.x; point2.x = t; } point1.x -= length;...

Polynomial Interpolation Algorithm from 1 to 9 Degree that Allows to Force the Constant Term to 0

10 Jun 2020 by fernando amatulli

Polynomial interpolation algorithm from 1 to 9 degree that allow forcing constant term to 0

A Monitored, Memory Mapped std::allocator for Mass Data Storage in STL Container

26 May 2020 by stefan stammberger

A novel allocator implementation for managing huge sets of data in STL's std:: containers for Windows operating systems

operating-systems

XorShift Jump 101, Part 1: Matrix Multiplication

14 Apr 2020 by Member 4201813

Jump forward/backward procedures for XorShift RNG explained step by step

Doing UTF-8 in Windows, Part 2 - Tolower or Not to Lower

18 Feb 2020 by Mircea Neacsu

Case folding for UTF-8 code

Create An Awesome WPF UI for Your C++/QT Applications

6 Jan 2020 by The Ænema

This article will teach you how to create an amazing, clean and smooth WPF/Winform UI for your native application without using any complex, unsafe, ActiveXish methods, etc.

DotNetPeLib: A Library to Read and Generate .NET Assemblies in C++11

2 Jan 2020 by Alexandre Bencz

DotNetPELib is a library which abstracts managed information such as namespaces, classes, fields, methods, and instructions. The information can then be used to generate assembly language source files, or PE executables or DLLs.

C Language Dynamic String

20 Dec 2019 by steveb

Dynamic string for the C language

CString and std::string Integration

19 Dec 2019 by Edwig Huisman

CString only projects can convert to STL std::string

Binary Coded Decimal

19 Dec 2019 by Edwig Huisman

A binary-coded-decimal class and the ODBC Interface

Compiling Your C Code to .NET - Part 1

17 Dec 2019 by Alexandre Bencz

With this new OrangeC/C++ compiler back-end, you can compile your C code to .NET

Fastest Hash Function for Table Lookups in C?!

30 Oct 2019 by Sanmayce

Brutally optimized hash function for general table lookups

Signal Segmentation Algorithm of Radhakrishnan, et al. Ported to C and C#

20 Oct 2019 by Lance A. Endres

The algorithm presented by Radhakrishnan, et al., originally used to segment well logs for the oil industry, has been ported to C and C#.

A Slice of Cucumber

9 Oct 2019 by Zebedee Mason

Visual C++ tests are created from Gherkin DSL feature files using a Python 2.7 script

WinLamb: using C++11 Lambdas to Handle Win32 Messages

22 Sep 2019 by Rodrigo Cesar de Freitas Dias

Introducing WinLamb, a modern C++11 object-oriented library to write native Windows programs

decode multiPage rotate tif.zip

12 Aug 2019 by LeisureBamboo

The decode and encode of multiPage rotate tif.zip

Slightly Less Costly but Much Usable C++ Reflection with Singular Inheritance Rule

9 Jun 2019 by cassert24

Template code for basic reflection functionalities (e.g., dynamic casting, instance type comparison, class name) with C#-like singular inheritance rule (a.k.a, one-base-multiple-interface rule)

Quick and Dirty but Neat-Looking C++ Alternative of C# Properties

6 Jun 2019 by cassert24

For those who are searching for a quick template code for the C++ replacement of C# properties, this is it.

Run a C Language Interpreter on Your ESP32

31 May 2019 by Rick Lunglhofer

Details the Implementation and use of a C Language Interpreter with a browser Interface running on an ESP32

Adding Object Detection with TensorFlow to a Robotics Project

28 Apr 2019 by Phil Hopley

In this article, we will add AI to an existing ROS (Robot Operating System) House Bot.

machine-learning

Chatbot Tutorial

24 Apr 2019 by Gonzales Cenelia

Tutorial on making an artificial intelligence chatbot

QxOrm - C++ ORM (Object Relational Mapping) Library

24 Apr 2019 by QxOrm

QxOrm C++ library: Persistence (based on QtSql Qt library) - Serialization (based on boost::serialization library) - Reflection (introspection)

C++ Object Relational Mapping (ORM)- Eating the Bun - Part 1 of N

20 Apr 2019 by BrainlessLabs.com, sibani.p

Creating a simple ORM for C++ on-top of SQL database

Embedding .PNG Images into a RichEdit Document

11 Apr 2019 by Jose A Pascoa

Although most Windows programmers have already used the RichEdit Control, many of them are not aware of all its capabilities. One such capability is image embedding.

State Machine Design in C++

20 Feb 2019 by David Lafreniere

A compact C++ finite state machine (FSM) implementation that's easy to use on embedded and PC-based systems

C++ State Machine with Threads

26 Jan 2019 by David Lafreniere

A framework combining state machines and multicast asynchronous callbacks

Asynchronous Multicast Callbacks with Inter-Thread Messaging

25 Jan 2019 by David Lafreniere

Simplify passing data between threads using this multithreaded, portable C++ asynchronous callback framework

multi-threading

IEEE 754 Conversion

22 Jan 2019 by Andrea Ricchetti

Two ways to make a IEEE 754 conversion (32 bit) pack and unpack

Rodney - A Long Time Coming Autonomous Robot (Part 3)

17 Jan 2019 by Phil Hopley

Third part in a series on a ROS (Robot Operating System) House Bot

Rodney - A Long Time Coming Autonomous Robot (Part 2)

16 Jan 2019 by Phil Hopley

Second part in a series on a ROS (Robot Operating System) House Bot

All About MFC Serialization

9 Jan 2019 by steveb

Describes all aspects of MFC serialization mechanism

CoreObjects/GoliahCore17: *.* for plain C

3 Jan 2019 by Sauro Abbondanzieri

UWP, COM, C++/WinRT, OOP in plain C. What else?

A Handy Idle-Processing Class for Long Procedures

31 Dec 2018 by Craig Muller

This article introduces a convenient class for hooking into idle processing.

CoreObjects/GoliahCore17: Effective OOP for plain C || 2

29 Dec 2018 by Sauro Abbondanzieri

Implementing a Canvas concept with OOP, in a fresh, polished and effective, pure and plain ANSI C

UWP Storage Wrapper

25 Dec 2018 by Shao Voon Wong

UWP Storage Wrapper

Lesson to Learn: Introduction to Genetic Algorithms

15 Dec 2018 by Dmitriy Gakh

An introduction to Genetic Algorithms with brief reference to biology and example of finding one solution for complex mathematical equation

machine-learning

Arduino Multitasking Using Loops

13 Dec 2018 by Tareq_Gamal

Simple way to create a Multitasking code for your Arduino project without using any external library.

Sending WhatsApp Messages from a Win32 C++ Program - Part 2

13 Dec 2018 by Michael Haephrati

A simple way for sending WhatsApp documents and images to an individual or to a group in C++

C++ audio mixing and WAV file & AudioFile classes

8 Dec 2018 by CalicoSkies

Mixing audio from multiple WAV files to a single WAV file. Includes a C++ class for reading and writing WAV audio files, derived from an AudioFile class for future support of other audio file formats.