Ready functions

Swift has a standard library and a number of libraries, like Foundation, that are available on all Swift platforms. Swift can also use system libraries from the platform on which it’s running. For example, on iOS you can use UIKit and on macOS you can use AppKit.

What are the pre-defined and ready-made functions in Swift

• Swift Standard Library

• Foundation

and which are most commonly used?

There’s no easy way to answer that; it very much depends on your specific goals.

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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

@dera There are a lot of func.

Some are "generic" as print, others for certain object type: such as map, filter, reduce for collection types, or replace, find, … for Arrays or Strings….

So the question should be asked the other way: what are you looking for ? Is there a Swift func for that task ?

A good way to answer is:

• look in Xcode doc
• search in Swift language reference
• ask the web…