Free Pascal Tutorial 18 - Hungarian Notation and Creating the GUI Window

The next four tutorials shows the creation of a very simple calculator program. Part 1 - Tutorial 18 - Uses Hungarian Notation and Creates the GUI Window Part 2 - Tutorial 19 - Performs Calculations and String Conversions Part 3 - Tutorial 20 - Uses RadioButtons to Select the Operator Part 4 - Tutorial 21 - Show Error Handling - So the Program Will Not Crash, If a Certain Situation Arises. Hungarian Notation: * Used in the Delphi and Lazarus code 
* Also used in other programming languages
* Used in naming of components - Common in Delphi and Lazarus
* Used in built-in properties - Common in Delphi and Lazarus
 * Other uses include names of user made variables - Not common in Delphi and Lazarus
 * Tutorial 16 used the built-in color clRed
 * Primarily used to shorten names of components i.e. RadioButton becomes rBtn
 * Also, used to label variables with the datatype in the name i.e. iNum1, iNum2 are integers. This is not normally used in user created variables in Delphi and Lazarus
 * Even if you do not use Hungarian Notation for names of components, it is still important to name the variable something meaningful. i.e. Instead of using the name Button12, use the name ButtonQuit. There is some discussion on using Hungarian Notation within the programming community. The idea of Hungarian Notation is to organize how things are named and bring some uniformity to how the program is written. However, if Hungarian Notation is overused this can complicate the code and lead to longer development times. This situation can be especially true when programming in Pascal. Pascal has a very eloquent, English-Like, syntax and Hungarian Notation make the code look more like C++ than Pascal. If this occurs, much of the reasoning to use Pascal will be lost.

Channel: iTunes Video Length: 8m 48s Date Found: Sat, Feb 06 2010 12:26 PM Category: Educational Date Produced: Sun, Jan 10 2010 5:10 PM View Count: 0