2,322 Reusable Code Snippet Topics
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 | How might I write an implementation in C of a case-insensitive version of the standard library function [inlinecode]strcmp[/inlinecode]? Here's how I might. This this is often available as a nonstandard function that may be called [inlinecode]stricmp[/inlinecode], [inlinecode]_stricmp[/inlinecode], [inlinecode]strcmpi[/inlinecode], or [inlinecode]strcasecmp[/inlinecode]. [i]See also [url=http://69.93.117.133/code/misc.php?action=edit&codeid=316]Strings: Comparing[/url].[/i] |
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| | This program outputs a given string word-wrapped to N columns in console. The program can also handle words whose length is greater than N. |
 | I created a bowling game, Which for the most part works correctly. I toiled for hours trying to figure out how to do the scoring so i gave up. Its fairly simple code so not much of a description needed. |
| | Shows how to create a simple 'Process Manager'. and control processes |
| | Hi there is the code for floating some thing (menus image or what ever you want).You can set an specific location for the floating item and when you web page is scrolled down or up the object will float to that position slowly or fastly as you set them, just … |
 | The lowly soundcard in your PC has fascinating capabilities. All you need is a module that can handle the Musical Instrument Digital Interface (MIDI). Tell the soundcard which instrument to play, specify the musical note, the duration, the beat and other things. The sound chip makes 127 instruments available and … |
| | Heres a precise and short way to permute any word without pointers |
| | Boo is new, well at least relatively new. If you are familiar with Python and C#, you can feel right at home. Most of Boo is written in C# by a Python devotee. Boo has static typing, but also mimics dynamic typing by inference. This way you are not in … |
| | So you want random numbers with negative values... How do you get them? This is a simple method to do so. |
| | Break down an amount into units of dollars and cents. |
| | This class implements a mechanism to encapsulate a selector. A selector is method signature descriptor. It is an easy way to create what may be called function pointers like in C language. I took my inspiration from Objective-C. |
| | A very versatile, fully customizable graph drawing program using the TurboC++ graphics library. The DrawGraph() functions does the actual graph drawing. It can be used to draw graphs of BOTH CARTESIAN AS WELL AS POLAR functions. You'll need to pass the math. function to the program. The main() demonstrates the … |
| | This is an Ada package that simply waits for the user to press the enter key. (If they enter anything else it's simply ignored.) |
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| | Program to demonstrate pattern-searching of strings. This program interactively builds a list of words and searches for words in the list that match a specified pattern. The pattern can include wildcard chars * and ?. Eg : The query s* gives the words in the list which start with s. … |
 | Powers of 2 are closly linked to the position values of binary numbers. The most right position is 2 to the power 0 = 1 then goes to the left with 2 to the power 1 = 2, 2 to the power 2 = 4 and such. If you want … |
| | Well its fairly self explanatory, its a program that shows that calculates the hypotenuse using the pythagorean theorum, It displays the values of the sides and shows a crappy ascii art right triangle with the values input and the later found values  |
| | The wx.ComboBox is a combination of an editbox and a (dropdown) listbox. It let's the user slect an item from the listbox and puts it in the editbox. In this snippet we use two comboboxes, each used to select an area unit of measurement. Once selected, an area value can … |
| | Ok I greatly modified a tutorial to have a completely different interface, a highscore list and a little tiny really rare easter egg. to get the highscore list. I want to figure out how to sort the highscore list if it is possible. And dont worry about it freaking out, … |
| | Not much excitement in that standard wxPython empty window icon. It's time you put a more picturesque icon up there. This snippet shows you how to use an embedded icon or your own icon you have as an icon file in your working folder. Actually, the embedded icon is written … |
| | In this experiment we call the paint event and establish a device context to draw a rectangle and fill it with the color set by the brush. Actually, we will draw 99 random sized and random colored rectangles with a small time delay. Don't worry, it will be faster than … |
| | How might I write an implementation in C of the standard library function [inlinecode]strcat[/inlinecode]? Here's how I might. |
| | The wxPython widget wx.Gauge is commonly called a progress bar. In this code snippet I have bound the wx.Gauge to a wx.Slider, as you move the slider so do the indicating bars of the gauge. A second method is explored too, here the gauge indicates the progress of a timed … |
| | Using a wxPython GUI program to find the position of the mouse when clicked within the frame/window. Also sets the color of the frame and changes the cursor to a pencil. The title bar of the frame displays the coordinates of the mouse position. |
| | Suppose you are a medical researcher studying diabetes. Your boss has given you a big chart of data from diabetes patients. Each row of the chart has information for one patient. Each column of the chart is a health-related statistic, such as height, weight, age, blood pressure, cholesterol level, etc. … |
| | Create a dictionary with char:count pairs, change the dictionary to a list of (char, count) tuples, sort the list by character and display the result. That's all there is to counting and displaying the characters in a given string. Just a few lines of Python code. |
| | This short code lets you create a base64 encoded image string, that you can copy and paste into your Python program code to display relatively small embedded images. For a typical application see: [url]http://www.daniweb.com/code/snippet393.html[/url] |
| | Small image files can be embedded in Python code using the base64 encoded string of the image. If you have to present a number of small fixed images in your program, embedding might be easier than including a set of image files. Attached files can be lost, and than your … |
| | Here is a generator function using find() to do a search for all the occurances of a substring in a text. It will give you all the positions/indexes within the text where the substring is located. The sample text here can be replaced by text read in from a file. |
| | This snippet takes a look at Python file handling. Different ways to write and read text files, zipped files and memory streams. Investigates how to access only part of a file. Also explores the "read" of a binary image file and performs a hex-dump of the data. |
| | This code shows you how to build a multiline story string that should display similarly to way it shows in the code. It should be relatively easy to maintain.  |
| | For loops in Python are quite versatile. The little keyword "in" allows you to loop through the elements of all kinds of sequences, may the elements be numbers, characters, strings, objects like tuples and more. Here is an example comparing range(), xrange() and a generator similar to xrange(). |
| | Years ago I wrote a little screen-saver in Delphi that randomly put colorful circles all over the screen. A hit with the secretaries in the office. I modified a simple Tkinter based snippet to put the same colorful circles all over a window form at random locations, random radii and … |
| | Find the maximum element in an unsorted array using recursion |
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| | This code enables one to find the height of a binary tree using a queue and a marker. |
| | VPython's fame is with 3D animated modeling, but it's plotting abilities, while not flashy, are easy to understand and very useful. This program uses VPython to plot math functions y = sin(x) and y = cos(x) and y = sin(x)*cos(x). |
| | Here's a cute little encipher/decipher program with a Tkinter GUI I wrote a while back. It's an implementation of a derivative of the Vigenere algorithm; the algorithm is taken from Laurence Smith's Cryptography: The Science of Secret Writing, Amazon link here. It's a dated book (and the technique itself is … |
| | If the user tries to put 80 characters in a 20-character buffer, you may have issues. This snippet shows one way to cap the input and discard excess input. [i]See also [url=http://www.daniweb.com/code/snippet280.html]Safe Version of gets()[/url] and [url=http://www.daniweb.com/code/snippet278.html]Read a Line of Text from the User[/url].[/i] |
| | This question came up on the forum. How do you swap two numbers without using a temporary variable? I used all the power of my brain to solve this at four o'clock in the morning. In all fairness, swapping two numbers using a temporay variable is about five times faster. …  |
| | Python has a module specifically made for timing built-in or owner coded functions. This code snippet explains how to use this feature. |
| | The psyco module has been around for a while and has been used to speed up the Python interpreter. For those of you who think speed is all important, take a look at a typical example. Psyco is similar to Java's just in time compiler. How does psyco do it? … |
| | Python24 introduces the function decorator that lends itself nicely to the timing of a function. As a sample function we are using the ever popular and rather stodgy prime number generator. The prime number generator seems to exist only to fluster students and to make niggling comparisons of the speed … |
| | This snippet shows one way to calculate the number of days since a given date until present time. Note that this code will not work for dates outside of the current epoch, which typically begins on January 1, 1970. |
| | This program use a while loop to delete trailing spaces and tabs from a string. It is meant to be more of an example of the application of the while loop. |
| | Commonly strings consist of ASCII characters, some are printable, some are in the backgrounds like the bell, carriage return, linefeed, tab and so forth. This code displays a table of ASCII characters and the corresponding decimal value. As always, you are encouraged to learn here. |
| | Just a colorful ten second countdown to New Year. Hope you can learn some code from it. |
| | The Python module zlib allows you to compress a typical text string to about one half its original size. A handy feature when you have to transmit or save a large amount of text or data. It saves you time both writing and later reading back the compressed file. The … |
| | Python uses C syntax to perform bitwise operations. Take a look at code that introduces you to bitwise operations at the binary level. |
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