TArray::FindLast

function Core Since 4.0

#include "Containers/Array.h"

Access: public Specifiers: const

Description

Searches the array from the end toward the front and returns the index of the last element equal to Item, or INDEX_NONE if not found. Use when duplicates may exist and you need the highest-indexed match.

Caveats & Gotchas

• An output-parameter overload also exists — FindLast(Item, Index) — that returns bool and writes the found index to Index. Prefer the single-return-value version unless you need the bool return for conditional branching in a single expression.
• FindLast uses linear search (O(N)); for large arrays with frequent reverse-lookups, consider a separate reverse-index map.
• Relies on ElementType::operator== for comparisons. If the type doesn't define operator==, this won't compile. Use FindLastByPredicate with a custom lambda instead.

Signature

[[nodiscard]] SizeType FindLast(const ElementType& Item) const

Parameters

Name	Type	Description	Default
Item	const ElementType&	The element value to search for using operator==.	—

Return Type

SizeType

Example

Find the last occurrence of a value C++

TArray<int32> Values = {1, 2, 3, 2, 4};
SizeType LastIndex = Values.FindLast(2);
// LastIndex == 3

if (LastIndex != INDEX_NONE)
{
    UE_LOG(LogTemp, Log, TEXT("Last '2' at index %d"), LastIndex);
}

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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