Computer Science / Unit 3 CS 0103 short lesson, about 20 seconds
The Array List
Captions available
The idea
An array list is a list data structure storing elements next to each other in memory, which grants random access — any position reachable in a single step.
In practice
A row of numbered lockers puts locker forty within one reach, no walking down the row.
Where people slip
The neighborly storage makes insertion in the middle expensive.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
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