# Publishers.CollectByCount A publisher that buffers a maximum number of items. ``` struct CollectByCount where Upstream : Publisher ``` ## Topics ### Creating a collect by count publisher [`init(upstream: Upstream, count: Int)`](/documentation/Combine/Publishers/CollectByCount/init(upstream:count:)) Creates a publisher that buffers a maximum number of items. ### Declaring supporting types [`typealias Output`](/documentation/Combine/Publishers/CollectByCount/Output) The kind of values published by this publisher. [`typealias Failure`](/documentation/Combine/Publishers/CollectByCount/Failure) The kind of errors this publisher might publish. ### Inspecting publisher properties [`let upstream: Upstream`](/documentation/Combine/Publishers/CollectByCount/upstream) The publisher that this publisher receives elements from. [`let count: Int`](/documentation/Combine/Publishers/CollectByCount/count) The maximum number of received elements to buffer before publishing. ### Comparing publishers [`static func == (Publishers.CollectByCount, Publishers.CollectByCount) -> Bool`](/documentation/Combine/Publishers/CollectByCount/==(_:_:)) Returns a Boolean value that indicates whether two publishers are equivalent. ### Default Implementations [Equatable Implementations](/documentation/Combine/Publishers/CollectByCount/Equatable-Implementations) ## Relationships ### Conforms To [`Equatable`](/documentation/Swift/Equatable) [`Publisher`](/documentation/Combine/Publisher) --- 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)