How to concatenate specific String from Array ? [SwiftUI]

Question

I have an array :

struct Main: Identifiable {
    var id = UUID()
    var value: String
    var type: String
}
var mainArray = [Main]()

And I need to output the "var value" of each of the elements which are in this array into a Text("")

Like : Text("(main[index].value)")

But I don't know the correct way of doing that

Also, I wiil need to be able to tweak the value I get with a function like :

func readMain() -> String {
        if main[index].value == "specificContent" { return "Correct" }
        else { return "Incorrect"}
    }

And then add my Text(readMain()) but that return all the values from the array like : Text("Correct, Incorrect, Incorrect, Correct, Correct")

Any idea ?

Thanks in advance !

Filip Sakel · Accepted Answer · 2020-03-26 14:59:00Z

1

I think you are looking for something like this:

@State private var mainArray = [Main]()

var body: some View {
    ForEach(mainArray) { main in
        Text(
            main.value == "correctValue" ?
            "Correct" :
            "Incorrect"
        )
    }
}

This prints whether the value property (of each Main element in you mainArray) is "correct" seperately.

If you want, though, your text to appear in one line with a space character separating the different mainArray values you could do this:

@State private var mainArray = [Main]()

var body: some View {
    Text(
        mainArray
            .map {
                $0.value == "correctValue" ?
                    "Correct" :
                    "Incorrect"
            }
            .joined(separator: " ")
    )
}

In the above sample the mainArray is converted into an string array containing a description of whether the values are "correct" and then these values are joined into one string with the space character (" ") separating them.

answered Mar 26, 2020 at 14:59

Filip Sakel

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1 Comment

albec Over a year ago

Thanks for your answer, I think it getting close to the solution :) The "Correct" "Incorrect" thing was just an exemple, in fact the values in my Array could be : "book title 1", "movie title 2", "book title 2", etc... And I want to output : Text("book title 1, movie title 2, book title 2") I tried with your first exemple code by just writing "Text( main.value )" and it output all of the values which is cool, but I need to be able to separate the different values (using a point, or a comma, as I wish) Is it possible ? Thanks again !

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