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iOS Object-Oriented Swift 2.0 Complex Data Structures Instance Methods

Kjetil Korsveien
Kjetil Korsveien
1,713 Points
Posted by Kjetil Korsveien
Kjetil Korsveien
1,713 Points

I get a lot of errors in Xcode.

I get errors in the code in Xcode following this example. Cant figure out what is wrong?

Kjetil Korsveien
Kjetil Korsveien
1,713 Points
Kjetil Korsveien
Kjetil Korsveien
1,713 Points

struct Point { let x = Int let y = Int

func surroundingPoints(withRange range: Int = 1) -> [Point] {
    var results = [Point] = []
    for xCoord in (x-range)...(x+range) {
        for yCoord in (y-range)...(y+range) {
            let coordinatePoint = Point(x: xCoord, y:yCoord)
            results.append(coordinatePoint)
        }
    }
    return.results
}

}

let coordinatePoint = Point (x: 0, y:0) coordinatePoint.surroundingPoints()

4 Answers

Felix Ayala
Felix Ayala
5,541 Points
Felix Ayala
Felix Ayala
5,541 Points

Hi Kjetil!

I see many syntax errors in your code. First of all, you need to declare Struct properties like this:

// Do
let x: Int
let y: Int = 0 // Here we are assigning an initial value

// Don't
let x = Int

Inside your function are ocurring the same:

// Do
var results:[Point] = []

// Don't
var results = [Point] = []

Everything should look like this:

struct Point {
    let x:Int
    let y:Int

    func surroundingPoints(withRange range: Int = 1) -> [Point] {
        var results:[Point] = []
        for xCoord in (x-range)...(x+range) {
            for yCoord in (y-range)...(y+range) {
                let coordinatePoint = Point(x: xCoord, y:yCoord)
                results.append(coordinatePoint)
            }
        }
        return results
    }
}

let coordinatePoint = Point (x: 0, y:0)
coordinatePoint.surroundingPoints()

Hope it helps!

Felix

Kjetil Korsveien
Kjetil Korsveien
1,713 Points
Kjetil Korsveien
Kjetil Korsveien
1,713 Points

Tnx a lot :) and how do I post my code like you do?

I still get an error on the return results function.

struct Point { let x: Int let y: Int

init(x: Int, y: Int) {
    self.x = x
    self.y = y
}

func surroundingPoints(withRange range: Int = 1) -> Point {
    var results:[Point] = []
    for xCoord in (x-range)...(x-range) {
        for yCoord in (y-range)...(y+range) {
            let coordinatePoint = Point(x: xCoord, y: yCoord)
            results.append(coordinatePoint)
        }
    }
    return results
}

}

let coordinatePoint = Point (x: 0, y:0) coordinatePoint.surroundingPoints()

Felix Ayala
Felix Ayala
5,541 Points
Felix Ayala
Felix Ayala
5,541 Points

In your code there is an extra dot:

return.results // Wrong
return results // Correct

Regards

Kjetil Korsveien
Kjetil Korsveien
1,713 Points
Kjetil Korsveien
Kjetil Korsveien
1,713 Points

Not in my latest post. I corrected a lot, but I still get an error on return results . I pasted your code and it worked. Has it anything to say that I use a Norwegian keyboard?

Felix Ayala
Felix Ayala
5,541 Points
Felix Ayala
Felix Ayala
5,541 Points

I corrected a lot, but I still get an error on return results . I pasted your code and it worked.

What did the error says?

Has it anything to say that I use a Norwegian keyboard?

I don't think so.

How do I post my code like you do?

You can learn Markdown Syntax. Click the link Markdown Cheatsheet below the form.

Regards

Felix