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arraysswiftdictionary
Никита Прибыткин
Никита Прибыткин

Reputation: 23

How to check if my array of dictionaries has certain dictionary?

I have two arrays of dictionaries with type [String: String]. How can I check if one array contains dictionary from another. 

    let firstArray: [[String: String]] = [dict1, dict2, dict3]
    let secondArray: [[String: String]] = [dict1, dict2, dict3, dict4, dict5]

I tried to do this with contains() method

    for item in firstArray {
        if secondArray.contains(item) {
            print("Hello")
        }
    }

but it throw an error there. So what's the best way to do this?

Upvotes: 0

Views: 2547

Answers (2)

Prashant Gaikwad
Prashant Gaikwad

Reputation: 3802

This works fine in Swift 4

let dictionary = ["abc":"pqr"]

if !myArray.contains{ $0 == dictionary } {
           //append dictionary inside array        
           myArray.append(dictionary)
   }
else {
     //dictionary already exist in your myArray
   }

Upvotes: 0

vacawama
vacawama

Reputation: 154583

You can use the predicate form of contains to accomplish this:

for item in firstArray {
    if secondArray.contains(where: { $0 == item })  {
        print("Hello")
    }
}

You can't use the other form of contains because type [String : String] does not conform to the Equatable protocol.

Upvotes: 2

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