Data Structure Visualizer

Step through fundamental to advanced operations across all data structures. Watch push, pop, shift, pointer reversals, tree descents, heap sift-downs, and hash bucket chaining animate in real time with line-by-line explanations and Big-O complexity notes.

Select Data Structure

Array & Dynamic Buffer

foundations

Contiguous memory slots with O(1) indexed random access and linear shifting.

Variant / Subtype:
Operation:
0
10
1
20
2
30
3
40
4
50
target → index 5
Allocate CapacityAction: read

Preparing to append 42 to array end at index 5.

Speed:
Algorithmic Code
typescript
1
function push<T>(arr: T[], val: T): number {
2
  // Check capacity & append
3
  arr[arr.length] = val;
4
  return arr.length;
5
}
Variable State
target: 5
Ready to solve algorithmic problems with these data structures? Head to Practice Problems or explore the animated curriculum on the DSA Roadmap.