Subscript

subscript(_:)

Accesses the element at the specified position.

Required. Default implementation provided.

Declaration

subscript(position: Self.Index) -> Self.Element { get set }

Parameters

position

The position of the element to access. position must be a valid index of the collection that is not equal to the endIndex property.

Discussion

For example, you can replace an element of an array by using its subscript.

var streets = ["Adams", "Bryant", "Channing", "Douglas", "Evarts"]
streets[1] = "Butler"
print(streets[1])
// Prints "Butler"

You can subscript a collection with any valid index other than the collection’s end index. The end index refers to the position one past the last element of a collection, so it doesn’t correspond with an element.

Default Implementations

MutableCollection Implementations

subscript(Range<Self.Index>)

Accesses a contiguous subrange of the collection’s elements.

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