2,322 Reusable Code Snippet Topics
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| | Hi All, thought I'd pass on a (very) simple password class which is built on the new `password_hash()` and `password_verify()` functions. You will need php 5.5.0+ in order to get this to work. If you're thinking of modifying this and using it in a production site, please check that your … |
 | The purpose of this class is to be able to create an html form with ease. This is inspired by the form helper in CodeIgniter. This can easily adapt to bootstrap or any css and jquery where id is required. To use this class, we need to include the class … |
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 | This snippet defines a function `printat()` which adds line and file information to the normal `print()` function output. The intended use is a quick and dirty debugging information for everyday's use. A more complete solution is to use a logging/debugging/tracing framework. |
 | Here's a simple game code, open a new vb project and copy paste this code and hit run. the game contains 3 levels, all you have to do is to shoot the smiley faces to earn money using mouse clicks, also there's a boss enemy on level 3. I didn't … |
 | Similiar to the snippet posted at: http://www.daniweb.com/software-development/python/code/449036/display-an-image-from-the-web-tkinter but this time we use PIL to resize the image from the internet keeping its aspect ratio to fit a specific display area/box.  |
| | The Pyside GUI toolkit (public PyQt) lets you bring up an interactive web page with its QWebView widget. Here is a simple example. |
| | [CODE]from Tkinter import * root = Tk() tipwindow = None # Creates a tooptip box for a widget. def createToolTip( widget, text ): def enter( event ): global tipwindow x = y = 0 if tipwindow or not text: return x, y, cx, cy = widget.bbox( "insert" ) x += …  |
| | The code simply captures your working window as jpeg image and stores it in the same directory as where your java class after compiling by javac is being stored |
 | I you ever would have the need to do this conversion you probably would use `string myStr = Convert.ToString(myInt,2);` which does the job. Here is presented another way to do this with some simple formatting included. Some highlights for newbies and not so newbies: Line 9: Custom enum type Line … |
| | This short Python program calculates Euler's number e, the base of natural logarithms, to a precision of at least 100 digits in this case. To get the precision needed, the Python module decimal is used. The result is compared to a published result. |
 | I accidentally posted a lower version of the game that had more flaws, and a few less features. This one has a few more minor bugs fixed, and a power attack instead of a normal attack. |
| | A common question that routinely comes up is how to share data between forms. I have outlined two common ways to pass data between forms, among many others. I have used a public property on the output form to accept a value and update the display. I also have a … |
| | This simple code shows how to write text with a given font, font size and color using the module pygame ... |
| | A feature of the doctest module can be useful when people copy and paste their idle window in the python forum: the ability to transform an example from the python interpreter into python code without the prompts [icode]>>>, ...[/icode] and the output messages. The script below permits to use this … |
 | This simple but extremely useful trick explains how to hande a radiobutton within an ASP.NET gridview, without having to fiddle around with the sometimes cumbersome beast that javascript is. To avoid postbacks, we'll be using ASP.NET AJAX's updatepanel. Basically, the logic is grabbing the sender (ie, the radiobutton checked), disabling … |
| | A Tkinter image button that toggles between an up and down button image. |
 | Hi all, I was just playing around with some ideas about optimizing a core piece of my library: the run-time type identification system (RTTI). What does that have to do with compile-time string concatenation? Well, the whole point of the RTTI is to provide information on the type of objects, … |
| | The user is asked to input a number in either Hex, Octal or Decimal, which is then converted to Hex, Octal & Decimal. The user can exit the program from the MAIN MENU or by the Escape key after each convertion. Compiler : Borland Turbo C++ v4.5.  |
| | This snippet defines a function [icode]mousepos()[/icode] which gets the mouse position on the screen. The package python-xlib is required. |
| | Hello All. Been playing around with some linked dropdowns. It seems to be a recurring theme here on DW, so I thought I'd offer this up as a possible solution or for discussion, to see how it could be improved. The premise for this set of linked dropdowns is that … |
| | This program takes a text string and creates a list of words. Any attached punctuation marks are removed and the words are converted to lower case for sorting. Now you can generate a dictionary of the words and their frequencies. The result is displayed using a sorted list of dictionary …  |
| | The Fibonacci series of numbers was used by Leonardo of Pisa, a.k.a. Fibonacci (around the year 1200), to describe the growth of a rabbit population. The series has been noted to appear in biological settings, such as the branching patterns of leaves in grasses and flowers. We take a look … |
| | 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 … |
 | **Introduction** Lets say you have a website with a mobile version and a desktop version. Pictures can be resized proportinally using css on either version. But not all html tags resize proportionally, for instance: iframes. **Javascript Function** includes: the *id* of the iframe, the *original width* and *original height* See … |
 | 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 … |
| | This is my first try with turtle graphics in Python. It is in fact a sort of "translation" from some old LOGO code. When you run it, this should be the result:  Insiders can perhaps play the "Dark side of the moon" record by Pink Floyd :) Any … |
 | 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 is a pretty darn simple snippet that I learned from a site (don't remember the name). This is just the working Javascript which i managed to "easily" replicate :P Hopefully this will be useful for you guys. Note, this won't graph anything unless you have the html/css (i didn't … |
| | 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 … |
| | Hello Everyone, I wrote this script way back in 2008 as Version1. However, I was forced to forget about this, because it was criticized by many developers with BS, MS, and "Seasoned PHP Developer" under their names. During those days, I couldn't stand up for my own reasons, because I … |
| | 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. |
| | A simple way to resize an image programmatically, using the PythonMagick module. This module is a python port of the [the magick++ library](http://www.imagemagick.org/Magick++/). |
 | 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 … |
| | Hi, I am just playing with C code in the console under Linux. In the old times a fair bit of code was written for a console; programs were operating in text mode, creating menues was quite a fun. I coded very simple c routine to print a strings of …  |
| | **// EDIT 2014-04-07 //** New version (1.0.3) posted at the [bottom](http://www.daniweb.com/web-development/php/code/476623/ajaxed-linked-dropdowns-select-fields-for-volatile-data#post2082327) Demo Page: http://demos.diafol.org/ajax-linked-dropdowns.php *********************************************** Hello All. Been playing around with more linked dropdowns (select form fields), following the code snippet posted for static-ish data [here](http://www.daniweb.com/web-development/php/code/475238/linked-dropdowns-select-fields-for-static-ish-data). The static-ish version is of limited use (or of no use!) if data in … |
| | 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 |
 | This is a function that I wrote and have re-used many times. I share it with you DaniWebers to use, laud or destroy! In a nutshell, this takes a user's search box input phrase and generates a series of LIKE clauses for your SELECT statement. Looks like "col1 LIKE '%s_term1%' … |
| | Don’t know if this is ever been done before, or even if it is a good way to do it. I’ll just await your comments if any. What I mostly found on the web is that if you want to define a polynomial you need to have an array containing … |
 | 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! |
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