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.


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