Instance MethodSwift

replaceSubrange(_:with:)

Replaces a range of elements with the elements in the specified collection.

mutating func replaceSubrange<C>(_ subrange: Range<Int>, with newElements: C) where Element == C.Element, C : Collection

Parameters

subrange

The subrange of the array to replace. The start and end of a subrange must be valid indices of the array.

newelements

The new elements to add to the array.

Overview

This method has the effect of removing the specified range of elements from the array and inserting the new elements at the same location. The number of new elements need not match the number of elements being removed.

In this example, three elements in the middle of an array of integers are replaced by the five elements of a Repeated<Int> instance.

 var nums = [10, 20, 30, 40, 50]
 nums.replaceSubrange(1...3, with: repeatElement(1, count: 5))
 print(nums)
 // Prints "[10, 1, 1, 1, 1, 1, 50]"

If you pass a zero-length range as the subrange parameter, this method inserts the elements of newElements at subrange.startIndex. Calling the insert(contentsOf:at:) method instead is preferred.

Likewise, if you pass a zero-length collection as the newElements parameter, this method removes the elements in the given subrange without replacement. Calling the removeSubrange(_:) method instead is preferred.