You can create a two dimensional array of one type of variable in swift with:
var array2D: [[String]] = [["hi", "bye"], ["hello", "goodbye"]]
I want to create a two dimensional array with the second variable a Float along the following lines:
var array2d2types = [[String,Float]] = [["height",1],["width",2]]
But this gives error: Cannot assign to immutable expression of type '[[Any]]'
How can I create an array of arrays each of which has a String and a Float?
Swift arrays are homogeneous, so you cannot store different typed elements in the same array. However, you can achieve your goals using an array of tuples instead of nested arrays.
let array: [(String,Float)] = [("height",1),("width",2)]
You can access the tuples using the normal subscript syntax
let firstTuple = array[0]
and the elements of the tuple using dot syntax
let height = firstTuple.0
let heightValue = firstTuple.1
However, you should use a custom struct or even better the built-in CGSize for storing height-width values.
let mystring = array[0].0 and let myfloat = array[0].1You should use a custom struct if you want to store various types. This has the added benefit of allowing you to access those values with a meaningful name instead of just an index. Use an array of tuples and .map(Record.init) to initializes the array of structures.
struct Record {
var string: String
var float: Float
}
var records = [("height", 1), ("width", 2)].map(Record.init)
print(records[0].string) // "height"
print(records[0].float) // 1.0
"publisherPlans": [ [ "Name","Free","Prime"],["Book Sell",9999,9999],["Book Bulk Sell",0,9999]] And I want To fetch all data and set to the View, I am trying this Model struct PublisherPlansModel: Codable { let publisherPlans: [[String]] }
let sizes: [CGSize] = [.init(width: 2, height: 1)]Using width and height may have been misleading These could be any stringand why not to think of them generically what you will do with key names in your app flow ????