Size
0
Controls
Stack selected.
Shortcuts: 1-4 switch structures, Enter add from Value, Shift + Enter load Bulk Sequence, 5 load challenge, Z/Y undo or redo.
Save one or two strong structures to build a reusable local demo shelf.
Operation Guide
Operation Log
Stack Visualization
Last-in, first-out behavior.
Structure Snapshot
Load or edit a structure to inspect its current posture.
Next Move Preview
Enter an integer or load a sample to preview the next structural move.
Challenge Objective
Load a richer structure before turning this into a walkthrough.
The app will tell you what setup move is still missing.
Status will switch to demo-ready once the current state clears the bar.
Demo Readiness Scorecard
Load or build a structure to score walkthrough readiness.
Readiness score: -
Operator Playbook
Load a structure to get a demo script.
The app will turn the current state into a concrete walkthrough idea.
Watch-out notes will appear here once the structure has enough shape.
Structure Switchboard
Load a structure to compare it against a better-fit alternative.
The app will tell you when the current workload would be clearer in another structure.
Switch advice will appear here once the structure has enough shape.
Search Insight
Run a search to inspect access cost instead of only the yes/no result.
The app will turn the last search into a position, path, or neighbor read.
This board stays focused on lookup cost and the nearest useful comparison.
Invariant Check
Load a structure to verify the active invariant.
Stress Test
Load a structure to get a pressure move.
The app will suggest the next operation sequence that exposes structure behavior under pressure.
Stress-test watch-outs will appear here once the structure has enough shape.
Open advanced analysis boards
Study Handoff
Load a structure to generate a concise study handoff.
The app will turn the current state into a one-minute recap plus the next move to demonstrate.
The export-style cue will stay focused on the active structure and the next visible teaching payoff.
Lookup Contrast
Load a structure to compare how the same workload would search elsewhere.
The app will estimate where lookup pressure would get cheaper or more expensive if you changed structures.
This board stays focused on search posture, not insertion or removal convenience.
Mutation Cost Board
Load a structure to see which next change is cheap, noisy, or shape-altering.
The app will turn the current snapshot into a state-specific add/remove cost read.
This board focuses on what the next mutation disturbs, not just the textbook complexity label.
Storage Lens
Load a structure to connect the visible shape to the storage story underneath it.
The app will turn the current snapshot into a memory-layout and access-path explanation.
This lens is about representation and traversal posture, not only the next operation.
Behavior Promise
Load a structure to name the behavioral promise it is actually making.
The app will translate the current shape into the user-facing guarantee that this structure is preserving.
This lens is about what the structure is protecting for the caller, not just how it is stored.
Transfer Cost Lens
Load a structure to see what it would cost to move this same workload into a better-fit lane.
The app will estimate whether the current values are easy to transplant or whether the current lane is already earning its keep.
This lens stays focused on migration pain and teaching payoff, not just asymptotic lookup speed.
History Pressure
Make a few edits to see whether the session is still exploratory or already branchy.
Undo and redo depth will turn the current session into a state-management read.
This board stays focused on edit churn, not the data structure invariant itself.
Branch Rehearsal
Undo or redo a few times to see whether the session still has meaningful alternate futures.
This board will turn redo depth and recent log divergence into a branch-readiness cue.
The goal is to show reversible storylines, not just that the buttons technically work.