+(_:_:)

Creates a new collection by concatenating the elements of a sequence and a collection.

Declaration

static func + <Other>(lhs: Other, rhs: Self) -> Self where Other : Sequence, Self.Element == Other.Element

Parameters

lhs:
A collection or finite sequence.
rhs:
A range-replaceable collection.

Discussion

The two arguments must have the same Element type. For example, you can concatenate the elements of a Range<Int> instance and an integer array.

let numbers = [7, 8, 9, 10]
let moreNumbers = (1...6) + numbers
print(moreNumbers)
// Prints "[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]"

The resulting collection has the type of argument on the right-hand side. In the example above, moreNumbers has the same type as numbers, which is [Int].