UBlueprintMapLibrary::Map_Length

function Engine Blueprint Since unknown

#include "Kismet/BlueprintMapLibrary.h"

Access: public Specifiers: staticBlueprintPureCustomThunk

Description

Returns the number of key/value pairs currently stored in the map.

Caveats & Gotchas

• Backs the Blueprint 'Length' node (searchable via the num/size/count keywords); in C++ call TMap::Num() directly instead of this wildcard wrapper.
• O(1) — reads the map's cached element count rather than counting entries on each call.

Signature

static int32 Map_Length(const TMap<int32, int32>& TargetMap);

Parameters

Name	Type	Description	Default
TargetMap	const TMap<int32, int32>&	Wildcard placeholder for the map in question.	—

Return Type

int32

Example

Get entry count C++

TMap<FName, int32> Scores;
Scores.Add(TEXT("Player1"), 100);
int32 Count = Scores.Num(); // native TMap::Num — the direct equivalent of the Map_Length node

Version History

Introduced in: unknown

Version	Status	Notes
5.6	stable	—

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