Swift .contains()

The .contains() method returns true if an array contains a specified element, and false otherwise.

Syntax

dictionaryInstance.contains(element)

• element: The item to check for in the array. It returns true if the item is present, and false otherwise.

To check if a dictionary contains a specific key-value pair, the following is used:

dictionaryInstance.contains{check}

• check: A closure that takes a key-value pair (key, value) and returns true if the pair satisfies the specified condition, and false otherwise.

Example

In the example below, .contains() is checking if a particular actor is in an array storing a movie’s cast:

let cast = ["Vivien", "Marlon", "Kim", "Karl"]
print(cast.contains("Marlon"))

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This example results in the following output:

true

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