Instance MethodSwift
reserveCapacity(_:)
Prepares the collection to store the specified number of elements, when doing so is appropriate for the underlying type.
Available because
Self
conforms toRangeReplaceableCollection
.
mutating func reserveCapacity(_ n: Int)
Parameters
- n
The requested number of elements to store.
Overview
If you will be adding a known number of elements to a collection, use this method to avoid multiple reallocations. A type that conforms to RangeReplaceableCollection
can choose how to respond when this method is called. Depending on the type, it may make sense to allocate more or less storage than requested or to take no action at all.