A few weeks ago I came across a situation where I needed to change a collection type from a Swift Dictionary to an Array. Then when using the subscript methods to access the values I noticed the Dictionary returned an optional and the Array returned a non-optional. My first thoughts were “That can’t be right. Surely an Array subscript should return an optional too.” Then I thought maybe I could extend Array to return an optional from a subscript or something similar but it seemed like an unlikely oversight for a new, well thought out language like Swift.

At…

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store