Map

A key→value lookup table (dictionary). Faster than searching an Array when you need to look up by key.

IsInputKeyDown — check if a specific key is held down this frame

FMod — floating point modulus remainder

Two Blueprints reference each other in a way that can't compile

Why: '{a}' includes '{b}' as a hard reference, AND '{b}' includes '{a}' as a hard reference. UE5 can't compile either one first without the other already being compiled. Fix: Break the cycle by making ONE side use a SOFT reference (TSoftObjectPtr). Pick the side that doesn't need {b} immediately at construction — change the variable type to 'Soft Object Reference' instead of 'Object Reference'. Use Load Asset to resolve it at runtime.

FCeil — round up to nearest integer

string

string

Less (float) — A < B

HasAuthority — server-side authority check for multiplayer

Switch On HasAuthority: 'Authority' exec fires on server, 'Remote' fires on clients. Use to gate server-only logic like damage calculation, score updates, spawning.

State machine pattern using enum variable and switch

Variables: CurrentState (your EState enum: Idle, Patrol, Chase, Attack, Dead). EventTick or custom Update event → Switch on EState(CurrentState) → Idle: [idle logic] → Patrol: [patrol logic] → Chase: [chase logic] etc. State transitions via custom events: OnEnemySpotted → SetVariable(CurrentState=EState::Chase). OnEnemyLost → SetVariable(CurrentState=EState::Patrol). OnDamaged → Branch(Health<=0) → True: SetVariable(CurrentState=EState::Dead). Key: Switch On Enum node — connect enum variable to the input, each value gets an exec output pin.

Array_Reverse — reverse order of array elements