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Smalltalk Programming Tutorial. Hints and Tips for students of the OU course M206. Smalltalk Hints and Tips |
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Tutorials | 1. Starting Smalltalk, and Terminology | 2. Precedence Rules | 3. Classes - Strings | 4. Class Browser | 5. Variables | 6. Error Messages | 12. Control Structures | 16. Dialogs | 23. Collection class | 39. OpenGUI | Information | Smalltalk Books | Student Software & Books | Hints & Tips | Sites | Download Smalltalk | Coloured code | Download Documents | ASCII Codes | Smalltalk Index |
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Error MessagesWhen programming Smalltalk, Error messages will soon be received. To a beginner these messages are confusing and unintelligible Tip 1. Make a list of Error Messages Your list should include:
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MethodsTip 2. Make a personal list of methods Since writing this I have greatly improved the Master Index with an index of methods section. This list does not include the information below but does include references of where to find information.Your list should include:
ConferencesTip 3. Make an early start at using the conferences If you are new to the Open University, using your OU FirstClass Guide enter the practice conference, send and retrieve messages. Ask for help via the conference if required. When you gain confidence go to the specific M206 conferences. | Error Messages | Key words (methods) | Save your work | Preventing Crashes | Top |
Save your workMake a mistake in programming and you can crash your computer, and loose a lot of your work. It could sometime mean reinstalling windows, with a loss of nearly everything.
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Debugger
Cant start an LBTip 14. If an exception message comes up when you try to start a LB. Use the debugger. The problem usually in a faulty class inialize method. See LearningBook will not open.
Searching LearningBook practicals / discussionsIt is very easy to search through the LearningBook practicals / discussions for a particular word or phrase. The default folder for these files is C:\M206\Lw\Html You can open Windows explorer Click on the above Html folder Use Tools Find Files or Folders Or from Windows desktop Click Start Find Files or Folders. In the Find Dialog window
The example, isVowel should find 5 files containing isVowel. Double click on one of them to bring up the file. Repeat this as required. If the file is big find in the Edit menu (or Ctrl F) can be used to locate the position within the file of isVowel. The F3 key will search for the next location. |
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