🔗 Swift Basics: Optional Chaining

Optional chaining is a process for querying and calling properties, methods, and subscripts on an optional that might currently be nil. If the optional contains a value, the call succeeds; if it is nil, the whole expression evaluates to nil instead of crashing.

This repository is a concise, runnable Swift playground learning example. It shows how the ? operator lets you safely reach into a chained call and gracefully unwrap the result.

• Using the optional-chaining operator (?) after a call that returns an optional
• Chaining firstIndex(of:) on an array with .description and .uppercased() in a single expression
• How the entire expression short-circuits to nil when the value is absent
• Producing a safely unwrapped optional String result without force unwrapping

let optionalChainingArray = ["Ahmet", "Alex", "Marcus", "Marie", "Natalie", "Ayla", "Marcus"]
let object = optionalChainingArray.firstIndex(of: "Marcus")?.description.uppercased()

git clone https://github.com/ahmetbostanciklioglu/OptionalChaining.git
cd OptionalChaining

Unzip OptionalChaining.playground.zip, open OptionalChaining.playground in Xcode, and run it to see the results appear inline.

• Xcode 12 or later
• Swift 5
• iOS playground target

Ahmet Bostancıklıoğlu — @ahmetbostanciklioglu · ahmetbostancikli@gmail.com

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