For loop based on array length in Swift

Question

I have been trying to take the length of an array and use that length to set the amount of times that my loop should execute. This is my code:

  if notes.count != names.count {
        notes.removeAllObjects()
        var nameArrayLength = names.count
        for index in nameArrayLength {
            notes.insertObject("", atIndex: (index-1))
        }
    }

At the moment I just get the error:

Int does not have a member named 'Generator'

Seems like a fairly simple issue, but I haven't yet figured out a solution. Any ideas?

Solution 1

You need to specify the range. If you want to include nameArrayLength:

for index in 1...nameArrayLength {
}

If you want to stop 1 before nameArrayLength:

for index in 1..<nameArrayLength {
}

Solution 2

for i in 0..< names.count {
    //YOUR LOGIC....
}

for name in 0..< names.count {
    //YOUR LOGIC....
    print(name)
}

for (index, name) in names.enumerated()
{
    //YOUR LOGIC....
    print(name)
    print(index)//0, 1, 2, 3 ...
}

Solution 3

In Swift 3 and Swift 4 you can do:

for (index, name) in names.enumerated()
{
     ...
}