- a table driven method is a scheme that allows you to look up information in a table rather than using (complicated) logic statements
Direct Access Table
- allows you to access the table element you are interested in directly
Indexed Access
- when you use indexes, you use the primary data to look up a key in an index table and then use the value from the index table to lookup the main data you’re interested in
- and so rather than being accessed directly, an indexed access table is accessed via an intermediate index
Advantages:
- A lot less space to create an index array with a lot of wasted space
- Cheaper to manipulate entries in an index than entries in a main table
- Maintainability by putting index-access code in its own routine
Stair-step access
- entries are valid for ranges of data rather than for distinct data points
Advantages:
- It works well with irregular data
- Flexible, modifiable
