O'Reilly logo

Mastering Swift 4 - Fourth Edition by Jon Hoffman

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Checking whether a set contains an item

We can verify whether a set contains an item by using the contains() method, as shown here:

var mySet = Set<String>()  
mySet.insert("One")  
mySet.insert("Two")  
mySet.insert("Three") 
var contain = mySet.contains("Two") 

In the preceding example, the contain variable is set to true because the set contains the string Two.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required