Static/Dynamic Sequences
Previously we have used an array to implement a stack
- fixed size collection of heterogeneous elements
- can be accessed via index or via "moving" pointer
The "fixed size" aspect is a potential problem:
- how big to make the (dynamic) array? (big ... just in case)
- what to do if it fills up?
The rigid sequence is another problems:
- inserting/deleting an item in middle of array
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