map inside map error? move the index outside-CodePudding

for example. I have two array for DataModel

let array1 = ["one","two","three"]
let array2 = ["one","two","three"]

another two array for DataModel2

let array3 = ["one","two","three"]
let array4 = ["one","two","three"]

my DataModel is

struct DataModel: Hashable{
        var image:String
        var name:String
        var dataModel2:[DataModel2]
}
struct DataModel2: Hashable{
        var image2:String
        var name2:String
}

I use the map method

convermodel = (0..<array2.count).map{
            index1 in
            datamodel(DataModel(image: array1[index], name: array2[index]) 
, dataModel2: (0..<array3.count).map{ index2 in
            DataModel2(image: array1[index2], name: array2[index2]) 
            
        }}

the compliyer call "Expected expression in list of expressions" " try breaking up the expression into distinct sub-expressions"

so how can i move index2 to the outside ??

CodePudding user response：

Based on Joakim Danielson's answer in your previous question you can do it without any loop by zipping the arrays

let converModel = zip(array3, array4)
    .map{ DataModel(image: $0.0, name: $0.1, dataModel2: zip(array1, array2).map(DataModel2.init)) }