I started working on Chapter 9 and immediately came across the following:
Page 140 its describing printing the value of Anna in the dictionary namesAndScores
print(namesAndScores["Anna"])
When execute this in the playground I get an error warning:
Expression implicitly coerced from 'Int?' to Any
There is no mention of this issue in the book.
So is this a bug?
The warning appears because you are trying to print an optional value to the console: dictionary values are optionals under the hood since they can be nil if their corresponding and associated keys don’t exist in the dictionary after all. As a workaround, unwrap the optional value before printing it out in order to silence the error and make it disappear once and for all.