CODEWITHSUNDEEP
swiftmultidimensional-array
potato
potato

Reputation: 4589

accessing values stored in multidimensional array

I'm wondering..is there a way to easily acces a value which is stored in an multidimensional array. I provided an example:

var arrayOfTwoArrays = [[2,3,4], [5,6,7]]
arrayOfTwoArrays[0,2]       //error saying:  Extra argument in call

arrayOfTwoArrays[0,2] should return (if this worked) value 4. This is not happening and I'm getting an error. The Apple documentation models multidimensional array as a linear array, but I don't want the extra work.

Upvotes: 1

Views: 73

Answers (1)

Airspeed Velocity
Airspeed Velocity

Reputation: 40973

An array of arrays is not quite the same thing as a multidimensional array (for example, the inner arrays can be of different sizes). So to get values from the inner array, first fetch it, and then subscript it:

arrayOfTwoArrays[0][2]

Incidentally, if your intent was to get the last element of the first array, and the size of the arrays can vary and sometimes be empty, you could write it like this:

if let x = arrayOfTwoArrays.first?.last {
    // use x
}

which would account for the possibility of empty arrays. You could then add an else to handle errors, or ?? to provide defaults, if this is a possibility you want specific handling for.

Upvotes: 1

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