# drop(while:) Omits elements from the upstream publisher until a given closure returns false, before republishing all remaining elements. ``` func drop(while predicate: @escaping (Self.Output) -> Bool) -> Publishers.DropWhile ``` ## Parameters `predicate` A closure that takes an element as a parameter and returns a Boolean value indicating whether to drop the element from the publisher’s output. ## Return Value A publisher that skips over elements until the provided closure returns `false`. ## Discussion Use [`drop(while:)`](/documentation/Combine/Publisher/drop(while:)) to omit elements from an upstream publisher until the element received meets a condition you specify. In the example below, the operator omits all elements in the stream until the first element arrives that’s a positive integer, after which the operator publishes all remaining elements: ``` let numbers = [-62, -1, 0, 10, 0, 22, 41, -1, 5] cancellable = numbers.publisher .drop { $0 <= 0 } .sink { print("\($0)") } // Prints: "10 0, 22 41 -1 5" ``` --- 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)