Software Development Forum

Because of their demand only nature, generators are ideal for finding the combinations of larger sequences. This code applies a Python generator to find the combinations of the sequence. Since permutations are a special case of combinations for all the items in a sequence, I have expanded the result to …

I love barcodes. In my line of work (image processing and document imaging), barcodes play an integral part in high quality automation. As such, I've developed code from the lowest level of encoding and decoding barcodes up to using a number of libraries for working with barcodes. The biggest problem …

Often times it is useful to instrument a program you do not have the source to in an attempt to learn more about it. This can be for debugging purposes, blackbox testing, or for providing alternate versions of common functions/libraries (to name a few). On Linux, there is a very …

Sometimes you want to add a little functionality to an existing class but you don't want to go to the trouble of sub-classing. A technique that you can use is known as **Extending**. For example, I frequently use regular expressions when working with strings. Wouldn't it be nice if strings …

Here some old fashioned line input routine, better idea nowadays would be to use GUI input box with real editing. Anyway, it is quite simple with Python to do this basic routine for terminal based program.

Optimizing Matrix Multiplication One time consuming task is multiplying large matrices. In this post we'll look at ways to improve the speed of this process. We'll be using a square matrix, but with simple modifications the code can be adapted to any type of matrix. The straight forward way to …

This snippet implements a pointed set, that is to say an ordinary set of elements with a distinguished element called the basepoint of the set. For example the seven days of the week could be stored in a pointed set, the basepoint being monday because today is monday. It is …

I did code for challenge that I saw posted for C# by deceptikon: http://www.daniweb.com/software-development/csharp/threads/479304/coding-challenge-string-to-date Here it is. Of course normally the code would be without prints and put in function, but this is enough for now for me. There could also be normalization from '/' separated form not producing ambiguous …

This small script named `sourcecode.py` is a command line tool to open a python module's source file with the default editor. For example the line $ python sourcecode.py xml.dom.minidom opens the file minidom.py from the python distribution with the default editor. The same works with user-defined modules having a python …

This snippet shows how to find the complex roots of a polynomial using python (tested with python 2.6). You need the scipy or numpy module.

This script computes the formal series expansion of a mathematical function on the command line using the python module swiginac, an interface to the CAS Ginac. Typical invocation in a linux terminal looks like $ serexp.py -n 7 "log(1+x)*(1+x+x**2)**(-1)" 1*x+(-3/2)*x**2+5/6*x**3+5/12*x**4+(-21/20)*x**5+7/15*x**6+Order(x**7) As far as I know, swiginac does not work in …

I [saw interesting problem](http://www.daniweb.com/software-development/legacy-languages/threads/478323/prolog) of generating spiral of numbers and realized I could reuse [my code for rotation](http://www.daniweb.com/software-development/python/code/371536/rotate-sequences-left-or-right) I posted earlier.

every combobox selection is replaced with what a user has selected, I want it not to be replaced so that all seleced combobox can be printed

Here is a simple Polynomial class. Its purpose is to show how one can [B]simply [/B]create a Polynomial class without using abstract datastructures such as linked lists etc. Each term is printed out in order of its power - from highest to lowest. Inspiration was taken from a Java source …

This code allows you to create a linked list and reverse it recursively.

Here is a sample code snippet of logging in a user against a user table in an MSSQL database with password encryption. Scott Knake

Here is a class I wrote to manage the MRU in a VB.Net application am writing. I did not find a build-in class in Visual Studio or on-line that did not look like a pain to use, so I made my own. While I have some 30 years of programming …

Saw [this](http://www.daniweb.com/software-development/cpp/code/216430/add-a-little-graphics-to-your-console) and decided to make a little spinoff with some physics of mine. Enjoy!

A simple program to show you how to create a table of Fahrenheit and Celsius values using a for loop. You may be able to learn from this code.

This AVI file player has some nice features like adjusting size and speed. The program uses the standard MSvfw32.lib (called libmsvfw32.a in the DevCPP lib directory). Another example of using BCX to translate to C code and modify to something Dev-C++ can handle. Enjoy!!!

This Program prints the numbers in given array(Row-Major Order) in Spiral order. Ex: Order Is 3*4 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Spiral Order Of Matrix is 11 12 13 14 18 22 26 25 24 23 19 15 16 …

If you use the Windows OS, then IronPython allows you to create a GUI program taking advantage of the .NET framework. You also have the option to compile the program into a standalone .exe file (and the needed .dll file).

here where am doing mistake and program is showing error non static method cannot be refferenced to static context

Thought it would be very complicated to include speech in your programs. As it seems, in it most simplest form it can be done in two lines. Don't forget to include the System.Speech reference in your References. Enjoy!

An image resize script that I have written to scale images from a digital camera. I couldn't used the gimp (my favourite image editor) to scale each of them one by one. This script takes two arguments which are both directory names. The first one is the directory containing images …

Using the Python Image Library (PIL) you can resize an image. Several filters can be specified. ANTIALIAS is best for downsampling, the other filters work better with upsampling (increasing the size). In this code snippet one image of each filter option is saved, so you can compare the quality in …

This handy little utility determines the size of a folder and it's subfolders in MBytes.

Code will check whether the number entered is integer or not. [inlinecode]ignore[/inlinecode] extracts characters from the input sequence and discards them. The extraction ends when max characters have been extracted and discarded or when the character delim(\n) is found, whichever comes first. In the latter case, the delim character itself …

Similarly, you can add more fields to an enum and simply provide accessor methods to retrieve them. For example you could change it to have an extra field indicating an output directory to write specific types of data to, and a getter method to return that directory.

**This is intented for learning purposes, feel free to study the code** Create a drawing that looks like this (pyramid) The number should be incremented with the modulus.

The greatest common divisor of integers x and y is the largest integer that evenly divides both x and y. Write a recursive method Gcd that returns the greatest common divisor of x and y. The Gcd of x and y is defined recursively as follows: If y is equal …

Here is simple text file example for beginners, using try..except for reading old content as it may not yet exist.

Using the Load and Unload events of the Forms add these subs to handle a simple fade in and out effect. This is not limited to just one form. The subroutine definition can be added to any global class allowing the use on any form or sub-form.

If your Excel spreadsheet is laid out as regular columns and rows with a header row that identifies the columns then this code will allow you to read the data using ADODB the same way you would read records from a database table. To try this code 1. Create a …

One of the things which attracted my attention was that there are often newbies asking how to create a password program in C/C++, often they don't succeed, well here's my response, you can use it for any purpose you want, one thing you'll have to keep in mind is that …

Here is an example on how to put at least lines and circles onto your windows console display. Yes, you have to jump through a hoop to do it. Dev-C++ can do this thanks to some BCX generated code. You have to set up your project as a Console Application …

This is a timer class that I wrote a while ago (cleaned up a bit for the snippet) for adding delays in some of the games I have written over the years. Note: I normally have the class functions in a .cpp file but since it looks like I can …

Most commonly a dictionary of key:value pairs is searched by the unique key. Sometimes it becomes necessary to search for the key, or keys given a value. Special consideration has to be given to this case, because the value does not have to be unique and may return several keys …

This python script prints all the columns of an sqlite database which path is given as argument.

A complete C implementation of Linked List...tested on Linux GCC

[B]1.[/B] Right click on your project name in solution explorer. [B]2.[/B] Point the cursor on [COLOR="Green"]Add[/COLOR] then choose [COLOR="Green"]Existing Item...[/COLOR] [B]3.[/B] Now go to the Location of your sound file and select that sound file. [B]4.[/B] Now select your sound file in solution explorer then Right click on it choose …

Converts Xml document to string

This is a basic CPP sleep fuction. As you can see CPP libs do not come with a time sleep/wait fuction to use in your code/loop. So due to boring jurney to Saint Petersburg, i decided to write something/code to give anyone who has been wondering why CPP does not …

Creating WinAPI windows and controls can be a pain and quite difficult/annoying at times. Most of the time, I find myself searching MSDN, DaniWeb, and StackOverflow. I hate having to use external libraries unless I absolutely have no other choice. Below contains code for creating WinAPI windows, Controls, Sub-Classing, and …

Shows you how to play sound files with the pySFML module and Python.

In my job I tend to write a lot of Windows services. Due to this I've pared it down to bare essentials so that the code is as simple as possible, but still fully functional for the needs of each service. What this generally means is I *don't* use the …