Subscript

subscript(_:)

Accesses the element at the specified position.

Declaration

subscript(position: Dictionary<Key, Value>.Index) -> Dictionary<Key, Value>.Keys.Element { get }

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

The following example accesses an element of an array through its subscript to print its value:

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

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.

Complexity: O(1)

Relationships

From Protocol

Collection