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Swift / Array / underestimatedCount

Contents

Declaration
Discussion
See Also

underestimatedCount

A value less than or equal to the number of elements in the collection.

Declaration

var underestimatedCount: Int { get }

Discussion

note:

O(1) if the collection conforms to RandomAccessCollection; otherwise, O(n), where n is the length of the collection.

See Also

Iterating Over an Array’s Elements

forEach(_:)
enumerated()
makeIterator()

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SwiftInstance Property

iOS 8.0+iPadOS 8.0+Mac Catalyst 13.0+macOS 10.10+tvOS 9.0+visionOS 1.0+watchOS 2.0+

Declaration
Discussion
See Also

Built on 2026-05-07