What I like about Swift is that it feels like a natural progression when learning more of the language’s features. Case in point: I’ve known about the where keyword for a while, and have used it plenty of times before, but just found this little ditty:

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if let someBool = someThing?.someBool where someBool {
  // do stuff if someBool is true
}

That will only execute the body of the statement if someThing is not nil and someBool is true. Before, I had thought that would’ve been two separate statements, and extra indenting. Kinda cool.