Instance MethodSwift

formIndex(_:offsetBy:)

Offsets the given index by the specified distance.

func formIndex(_ i: inout Self.Index, offsetBy distance: Int)

Parameters

i

A valid index of the collection.

distance

The distance to offset i. distance must not be negative unless the collection conforms to the BidirectionalCollection protocol.

Overview

The value passed as distance must not offset i beyond the bounds of the collection.