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Mastering Swift 4 - Fourth Edition by Jon Hoffman

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Removing items in a set

We can remove a single item or all the items in a set. To remove a single item, we would use the remove(_:) method and, to remove all the items, we would use the removeAll() method. The following example shows how to remove items from a set:

//The remove method will return and remove an item from a set  
var item = mySet.remove("Two") 
 
//The removeAll method will remove all items from a set  
mySet.removeAll() 

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