Software Development Forum

This is another useful script I came across. It prints a color-code chart in your terminal. It can help you find the color-code you are looking for, or view the current color-scheme you are using (people use it on reddit/r/unixporn to show off their system's theme, I use it to …

I didn't write this, the credits are in the code. It's a code-golf version, and I'm sorry about that. I am trying to 'decode' it but I don't have the skills, so the 'decoded' version doesn't have the right colors. This is an example of what you can do with …

I just wanted to show the basic usage of docopt, a module that makes parsing command-line arguments so much easier. I'm not affiliated with the creators of docopt, but I'm certainly thankful for their work and happy to post this little snippet. I will point you to [docopt.org](http://docopt.org) for more …

Complex numbers are seldom used in daily life, altough you could say that every real number is complex, but with the imaginary part equal to zero. And btw. "complex" is a bit of a misnomer, perhaps we should call them "easies", because often they make it easier to perform certain …

This module is for validating textboxes.... After using this module in your project you can simply validate all of your text boxes like [CODE] Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load AssignValidation(Me.TextBox1, ValidationType.Only_Digits) AssignValidation(Me.TextBox2, ValidationType.Only_Characters) AssignValidation(Me.TextBox3, ValidationType.No_Blank) AssignValidation(Me.TextBox4, ValidationType.Only_Email) End Sub [/CODE]

Hello This is a demo showing Java interacting with Daniweb's new API ( http://www.daniweb.com/api/documentation ) You introduce a member's name and it should show you the total number of posts he has made. Demo is a proof of concept: No bug checking, error checking, etc is in this code. In …

Here is a short Python program using the module pygame that lets you play a midi music file. Midi files are instrumental music files that pack a lot of good sound into a small file. They are very popular with web page designers.

A somewhat newer look at Peter Parente's pywin32 based speech engine. It will read text on your computer.

Yes, you can let your computer read text to you. The task is relatively easy, if you have Windows on your machine. All you need is Microsoft's speech-API SAPI, the Python Text to Speech module pyTTS, and an updated version of win32com, all free downloads. Here are some experiments with …

You can fix one parameter of function call by calling underlying method of fixed parameter instead of using functools.partial or lambda statement.

This code example shows how to create a dictionary with row,column indexed (r,c) key tuples from a typical list of lists 2D matrix. Also an example is shown of the ease of processing the resulting dictionary.

RestSharp library needed

This code shows how to use a minimum Windows Gui program to display the results of a bubble sort of an integer array.

A simple test of PySide's QFileDialog widget and its method getOpenFileNames. Use method getOpenFileName if you want just one file name.

Hello. This code snippet is a basic calculator. The general concept is that the calculator accepts infix expressions as strings, converts them to reverse polish notation by way of the shunting-yard algorithm and then evaluates the resulting expression. I tried to encapsulate the functionality of each piece so that, in …

I needed a 5 minute countdown for a project I was working on so I hacked this up, It does nothing more and nothing less. Figured I would post it while I was here to save someone else the trouble. (Not that it's in anyway difficult to do.)

Simple code to show you how to display an image from a Web URL using the Tkinter Python GUI toolkit, the Python Image Library (PIL) and the data_stream created with io.BytesIO().

I was going to post this in a thread, but it turned into something a bit more serious and may be useful as a code snippet. The code shows three files: * menu.h: The header file for the menu library. * menu.c: Implementation of the menu library functions. * main.c: …

So you want to find out which day of the week you were born. Well at least some of us do. I actually wrote this program because my whole family was born on Sundays, and my friends didn't believe it! An oldie but goodie, moved from DeSmet C to Turbo …

Hey guys.. need some help with this; I'm pulling my hair out.. i've trawled these boards but can't find anything that answers my question. I, like many others before me (so it seems!) am trying to create a program to check for a palindrome.. this is what I have so …

I have seen many questions on autocompeletion for *java text components* like `JTextField` `JTextArea` `JTextEditorPane` etc. There are not many options either: 1) 3rd party library (like SwingX) 2) DIY (i.e using `DocumentListener`, `JWindow` with `JLabel` etc and a few requestFocusInWindow calls) I chose number 2 and put the code …

A temperature converter GUI. Converts from Celsius to Fahrenheit and vise versa. Tests JLabels, JButtons and JTextFields. *Two separate programs, Converter and Thermometer (Thermometer Class)*

Here's a simple wrapper for printing text. Built as a class library, this can be used in any .net application. This has automatic word wrapping. I figured that using the new constructor to accept different parameters would easily allow for printing different documents with different settings. I included Name, Font, …

The above code computes the value of a mathematical expression supplied at command line by using the concept of converting infix to postfix,then evaluating the postfix expression. Any comments are appreciated.

Finding some text and replacing it with new text within a C string can be a little trickier than expected. Here is what I had come up with one day.

This short piece of code shows you how to display text in color in a C# windows console program. The corresponding WIN32 API functions are in the kernel32.dll and are imported and declared external. The only other problem is to assign variable types that accommodate the types listed in the …

A permutation is the arrangement of a set of items in different order. One interesting application is the rearrangement of characters in a word to create other words. If all the n characters are unique, you should get n! unique permutations. You can make a list of words unique by …

Scientists and deficit spenders like to use Python because it can handle very large numbers. I decided to give it a test with factorials. Factorials reach astronomical levels rather quickly. In case you can't quite remember, the factorial of 12 is !12 = 1*2*3*4*5*6*7*8*9*10*11*12 = 479001600, that is 479 million …

This snippet allows you to find the number of ordered permutations of items taken from a population of known size. It uses the well know algorithm with factorials. For very large populations you may want to use an approximation of factorials.

If you want to know the number of combinations of x things taken n at a time, you can use the Python module gmpy. The module gmpy is a C-coded Python extension module that supports fast multiple-precision arithmetic, very handy if x things reach a large number.

Upon resizing an anchored combobox - I noticed the text was always selected. This sparked the initiative to fix this problem. (Microsoft decided not to) So by extending the combobox class we can fix this. The following class can be dropped into a form for designer manipulation or as a …

A lot of questions in the VB.NET forum are database related. Most of the code that gets posted result in one or more comments like "use parameterized queries to avoid SQL injection attacks". I won't describe the nature of a SQL injection because it is easily looked up via google. …

This Python snippet shows how to control a VPython visual 3D sphere with Tkinter GUI toolkit button clicks.

Let's imagine you are taking a lot of pictures and modify them with one of those fancy image editors. You burned the image files to a CD, and decided to purge some of the outdated files because your hard drive is getting full. This Python code allows you to set …

As the title says, it's a simple trie class written in C++11. The only operations implemented are insert, remove, and search (both prefix and exact matches). I sort of abandoned the test/debug process, and while I'm somewhat confident that there aren't any serious bugs, I can't guarantee it. Use this …

So, in answering another thread on this forum, I decided to do some performance testing on String. Mainly because a friend of mine said "You should always use `new String` it's the fastest!". I wasn't convinced and argued in favour of StringBuilder, at which point I was directed to some …

A simple code example to calculate the monthly payment on a mortgage loan. Takes a look at Python's newer print and format functions.

This shows the code for one simple crypt of text by swapping two adjoining characters each. You can make that more complex if you like. Can also be used for one nice riddle.

This snippet defines a Print function which can be used with python 2.4, 2.5, 2.6 and 3.0 (for 3.0 this is just the built-in print function). It's interface is that of the python 3.0's print. It simplifies the task of writing transitional code which runs under python 2.5 and python …

Just a different way to extract desired data from an xml code string.

Here is my celebration post for entering level 3 in Project Euler. Again I left in my debug prints. I am in process of adapting myself to new .format style of formatting. I have commented out the prints though to get visible the running time of the functions own action. …

Explore the Python module bisect to search a sorted list and insert elements in the proper location in a sorted list.

I wanted to make an array of bits which I could click on and off at will. Sort of a register you could manipulate. First thing that came up was a checkbox control. But I wanted to change the usual checkmark with a 1 or a 0. With tips from …

A short code to show you how you can download and display an image from the internet on Python's Tkinter GUI toolkit.

These are (I guess) the most basic printing instructions in C#, to let some printed paper coming out of a printer. Start a new Forms application, drop a ComboBox, a Label and a Button on the form. Implement a form Load and a Button Click event and fill in the …

Just a simple Jython code to test drawing on the canvas.

One of the things I have been steadfastly avoiding is writing code to print stuff. Most of what I want to print is from withing apps like Outlook or Word that already provide that functionality. But I finally ended up having to bite the bullet. What I ended up with …

The annoying use case is this: for (vector<int>::size_type i = 0; i < v.size(); i++) { cout << v[i] << ' '; if (i == v.size() - 1) { cout << endl; } } C++11 offers the `auto` keyword for initializer type deduction so that we can avoid verbose and …

A small test program exploring the PySide/PyQT Label widget. With HTML code you can do some nice formatting of the label's text.