Combine two Dictionaries

Question

I'm learning Swift and can't find the solution for my problem...

I have two Dictionaries and want to combine them:

dict1 = ["A": 1, "B": 2, "D": 5]
dict2 = ["A": 3, "C": 9, "D": 4]

The outcome should be a new Dictionary like:

dict3 = ["A": 4, "B": 2, "C": 9, "D": 9]

It's [Swift](https://en.wikipedia.org/wiki/Swift_(programming_language)), not [SWIFT](https://en.wikipedia.org/wiki/Society_for_Worldwide_Interbank_Financial_Telecommunication) — Alexander, Feb 19 '22 at 14:40

Leo Dabus · Accepted Answer · 2022-02-19T19:03:10.510

7

You can use Dictionary merging method and pass the plus sign (addition operator) as the uniquingKeysWith parameter:

let dict3 = dict1.merging(dict2, uniquingKeysWith: +)  // ["A": 4, "B": 2, "D": 9, "C": 9]

edited Feb 19 '22 at 19:03

answered Feb 19 '22 at 14:25

Leo Dabus

2

Thanks a lot! The answer is so simple i wasn't able to find it xD – Tim Schellenberg Feb 19 '22 at 14:28
1

If it helped, you could mark this as answer. – Manjunath K Mayya Feb 19 '22 at 15:41

1 Answers1