so I have an array and I want to add 1 to all the items.
var arr = [2, 3, 6, 9]
for (index, x) in enumerate(arr) {
arr[index] = arr[index] + 1
}
is there a simpler version of this? there's no reason to have 'x' in there. I know there's the alternate way of writing it this way:
arr[index] = x + 1
but that doesn't seem like enough reason to have 'x' there.
You can iterate indices of the array
var arr = [2, 3, 6, 9]
for index in indices(arr) {
arr[index] += 1
}
Essentially, indices(arr) is the same as arr.startIndex ..< arr.endIndex, but it's simple :)
OR, in this specific case, you might want to:
arr = arr.map { $0 + 1 }
map function a bit further I realized it's also possible to do these: arr = arr.map { $0 * $0 + (2 * $0) }Yes, this is a really good use case for the .map function.
var arr = [2, 3, 4]
arr = arr.map({$0 + 1})
// arr would now be [3, 4, 5]
