CODEWITHSUNDEEP
iosarraysswift
Josip Bogdan
Josip Bogdan

Reputation: 588

Why is this array out of index?

I am trying to sort elements into a two dimensional array I built this way, but when the code gets to the 2D array I get an error: "array out of index".

var categoryTempArray: [[ProductCatalogue]] = []

func sortinOut(){
    var i = 0
    var j = 0
        for x in categories{
            for y in array{
                if x == String(stringInterpolationSegment: y.categoryName){
                categoryTempArray[i].append(y)
                //categoryTempArray[i][j] = y tried this too
                    j++
                }
            }
            i++
        }}

Upvotes: 0

Views: 98

Answers (2)

Josip Bogdan
Josip Bogdan

Reputation: 588

This worked in the end

for x in categories{
                for y in array{
                    if x == String(stringInterpolationSegment: y.categoryName){
                        var tempArray: [ProductCatalogue] = [y]
                    categoryTempArray.append(tempArray)
                        j++
                    }
                }
                i++
            }

then i can use array like this categoryTempArray[i][j]

Upvotes: 0

jalone
jalone

Reputation: 2073

You should initialize the [i]th element before than appending some [j]th element to it.

You would call the append() function on an item that does not exist, since no item exists in the categoryTempArray array, thus the index out of bound.

Upvotes: 2

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