IsValid

Returns True if an Object Reference points to a live (non-destroyed) UObject. Always IsValid-check references before use to avoid crashes.

IsValid — check if object reference is valid (not null or pending kill)

IsValid is a MACRO with two exec outputs: 'Is Valid' and 'Is Not Valid'. NOT a pure bool function.

IsValid macro — check validity with exec branch outputs

K2Node_MacroInstance from StandardMacros. Has exec pins unlike the pure IsValid function.

IsValid — check if object reference is valid and not pending kill

UKismetSystemLibrary::IsValid. Also check IsValidMacro for exec-based branching (Is Valid + Branch combined).

Array_IsValidIndex — check if index is valid for array

BooleanAND — logical AND

OR=BooleanOR, NOT=Not_PreBool, XOR=BooleanXOR

IsInAir (IsFalling) — true if character is in the air

Call on the CharacterMovementComponent, not directly on Character. Or use IsMovingOnGround.

Not_PreBool — logical NOT

OR Boolean — logical OR of two booleans

ClearAndInvalidateTimerByHandle — stop and clear a timer

K2_ClearAndInvalidateTimerHandle.