Code Snippettes

I can't make any claim regarding the functionality of a given piece of code. Use at your own risk. If you do something stupid, don't whine at me.

On the other had, if you have a question about some code drop me a note.

perl || java || javaScript|| c/c++/c# || pascal

Perl

My favorite language.

I have finally reached a point where I am comfortable programming in perl. Now, when I approach a problem I don't wonder 'if' I can solve the problem with perl, just how. Then again I have a fairly high standard for 'comfortable'. I have been programming in perl for more than 12yrs. I know I don't know everything, but I do know where to find the answers to my own questions.

• Page reader: code
  Automated page reader. It pulls an input set of pages, parses the input, reformats it and prints it out to a local file. Can be retasked to pull any page.
  HTTP, LWP, User Agent, File::Basename
   
  
• RSS News Reader: code
  Code that posts the RSS feeds on this site's homepage.
  XML, RSS, <DATA>
   
  
• Passing a constant value to a module: code
  Example of passing a constant into a module. I use it for setting my debug level globally.
  begin, init, caller()
   
  
• Two Bubble Sorts: code
  Two examples of a bubble sort. The first doing it node by node within the array. The second uses the sort function within perl.
  arrays, sort()
   
  
• Autoload all modules stored locally: code
  I hate looking everything up when I need to build up a new perl environment. So, I wrote this little util. Install perl, copy all of the needed modules into one directory, update the directory pointer within the utility, and run it. It saves a lot of time. With a little work, it could be altered to do rpms, or any other serial execution sequence.
  dir reading, local execs
   
  
• Randomizer: code
  Example of a randomizer pulling from an array or possible text strings.
  arrays, foreach(), constants, srand(), rand()
   
  
• Hello World for CGI: code
  Just your classic Hello World program targeted for CGI
  cgi, web
   
  
• Who Am I for CGI: code
  Another basic test to see who CGI scripts are running as within the web server environment.
  cgi, global vars
   
  
• Diagnostics for CGI: code
  This script dumps a collection of internal variables from the web server environment.
  cgi, web
   
  
• Color Converter: code
  Converts an input RGB or HEX color into the matching opposite color.
  cgi, web
   
  

Java

I am fairly new to Java. I have been around it for years, fixing buggy code and installing it into web sites, but I have never really learned enough to code something useful in the language. That is changing.

• Hello World: code
• Cost of Goods: Command line version: code
• Cost of Goods: Window driven version: code
• Pennies For Pay: code
• Math Tutor: code
• Race Results: code
• Class Grades: code
• Class Grades: Driver file: code
• Html Table Generator: code
• Html Table Generator: Driver: code
• Keyboard Input Reader: code Required by several of the above programs.

JavaScript

With JavaScript, I think it is easier just to show you the working code snipettes, then you can look at the source and see what is happening. I have more than a few book on DHTML and JavaScript, so some of this code comes from those sources, while some of it is mine, the rest I found on the net.

A word on copyrights.
A lot of people will 'copyright' their javaScript. I don't. US Copyright law basically states that code/software can not be copyrighted, if a function can be created by any reasonably skilled programmer. For example: How many people have written date stamps? Thousands! I have 3 or 4 of my own that I wrote from scratch to do some weird little formatting trick. Another example, is the rotating images script below. I wrote it to moves 9 images at once, linking a rolling image to the correct alt tag and url. Can I copyright my code? 'No.' If you have half of a brain, you could have written any of this code yourself, but the point is to SAVE time and effort. Take this code. Learn from it. Use it! Send me a note when you get it running.

Image Stuff:

• Slide Show
• Rotating Banners
• Randomized Images
• Rolling Images

Games:

• Icon Match
• Icon Match for 2 players
• Tetris
• Columns
• Towers of Hanoi
• Tic Tac Toe

Utils:

• Convert Inches to Centimeters
• Digital Clock

C/C++/C##

C was the second language I learned in college. Since then I have taken classes in C++. After I learned a bit of Java, I have started coding C## in the Visual Studio.net ENV.

Pascal

The first language I learned in my college programming sequence

Does anybody actually use this language any more?!??

I suppose what is most amusing was what we programmed in college. Criuse Missle Guidence software. One of the grad students had a grant to work on guidence software. Of course, this became 'needed' knowledge. So we, the coding noephytes, read in altitude maps, converted them into binary representations, and massaged the data. The result was usable map, just pick you low-level flight path based upon the output map.

I looked around for my old code. I think it has disappeared somewhere in all of the moves and code purges since college. It still might turn up, but who really needs code from an entry level programming course... Maybe, entry level programmers? We all started there once upon a time.

I found some code buried in the back of my closet on a couple of floppies during my last data purge. No promises as to quality or actualy usefulness.

All of the below code comes from Pascal Plus Data Structures, Algorithms, and Advanced Programming. The code is actually from an older version of the book, but it should work the same. To be totally accurate I have two copies. The 1991 version and the 1995 version, which is the cover you see here. 2 classes, 2 books. Yes, I had to take a full year of Pascal, before I was allowed to learn anything useful, like C.

• Program ListAndCount: code Chapter 1
   
  
• Procedure BinarySearch: code Chapter 2
• Test driver for search procedure: code Chapter 2
   
  
• String ADT: code Chapter 3
   
  
• Stack ADT - array implementation: code Chapter 4
• Stack ADT - linked implementation: code Chapter 4
• Program Calculator: code Chapter 4
   
  
• FIFO Queue ADT - array implementation: code Chapter 5
• FIFO Queue ADT - linked implementation: code Chapter 5
• Test driver for queue operations: code Chapter 5
• Program Simulation: code Chapter 5
   
  
• List ADT - array implementation: code Chapter 6
• List ADT - linked implementation: code Chapter 6
• Test driver for list operations: code Chapter 6
• Program AdManager - first increment: code Chapter 6
• Program to make empty AdFile for AdManager: code Chapter 6
   
  
• List ADT - circular linked list: code Chapter 7
• List ADT - header and trailer: code Chapter 7
• List ADT - doubly linked list: code Chapter 7
• Program AdManager - final program: code Chapter 7
• Program AdManager - AdRates UNIT: code Chapter 7
• Ad price input file for Program AdManager: code Chapter 7
  (Need to rename this file: adprices)
   
  
• Program MazeExit: code Chapter 8
   
  
• Binary Search Tree ADT: code Chapter 9
• ListAndCount, with cross reference: code Chapter 9
• Reserved word file for cross reference: code Chapter 9
  (Need tp rename this file: reserved.txt)
   
  
• Heap, implemented in array: code Chapter 10
• Priority Queue ADT - heap implementation: code Chapter 10
• Graph ADT - adjacency matrix implementation: code Chapter 10
• Graph search applications: code Chapter 10
   
  
• Seven sorting procedures: code Chapter 11