How do put multiple values into a single key in Swift?-CodePudding

Is there a way to put multiple values in one key in Swift's dictionary, such as 'multimap' in Java?

var multiDic = [String:UserData]()

This is the dictionary I declared. it has this structure.

struct UserData{
    var name: String
    var id: String
    var nickname: String
}

And when I put the value in one key in the dictionary, the value is updated without being stacked.

for key in 1...10 {
    multiDic.updateValue(UserData(name:"name \(key)", id:"id \(key)", nickname:"nick \(key)"), forKey: "A")
}

print(multiDic.count)

reults 1

How can I accumulate multiple values on a single key? I looked up a library called 'Buckets' (https://github.com/mauriciosantos/Buckets-Swift#buckets), but there has been no update since swift 3.0.

CodePudding user response：

Swift dictionary doesn't support this. One work around is to declare the dictionary to hold an array of values, like this:

var multiDic = [String:[UserData]]()

You would have to modify your code for adding values to work with the array instead of updating the value in place.

I haven't tried the "Buckets" project you mention, but for what it's worth, it probably still works either as-is or with minor changes.