# tryLast(where:) Publishes the last element of a stream that satisfies an error-throwing predicate closure, after the stream finishes. ``` func tryLast(where predicate: @escaping (Self.Output) throws -> Bool) -> Publishers.TryLastWhere ``` ## Parameters `predicate` A closure that takes an element as its parameter and returns a Boolean value that indicates whether to publish the element. ## Return Value A publisher that only publishes the last element satisfying the given predicate. ## Discussion Use [`tryLast(where:)`](/documentation/Combine/Publisher/tryLast(where:)) when you need to republish the last element that satisfies an error-throwing closure you specify. If the predicate closure throws an error, the publisher fails. In the example below, a publisher emits the last element that satisfies the error-throwing closure, then finishes normally: ``` struct RangeError: Error {} let numbers = [-62, 1, 6, 10, 9, 22, 41, -1, 5] cancellable = numbers.publisher .tryLast { guard 0 != 0 else {throw RangeError()} return true } .sink( receiveCompletion: { print ("completion: \($0)", terminator: " ") }, receiveValue: { print ("\($0)", terminator: " ") } ) // Prints: "5 completion: finished" // If instead the numbers array had contained a `0`, the `tryLast` operator would terminate publishing with a RangeError." ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)