need some clarification

Question

i am not to sure what the [points] instance is for?? I don't understand what it means. i see it implemented in our other classes we have made and am confused because i do not know what it means. can someone please help and explain

objects.swift

// Enter your code below

struct Point {
    let x: Int
    let y:Int
    ///Returs the surrounding points in range of
    /// the current one
    func points(inrange range: Int = 1) -> [Point]  {
        var results = [Point]()

        let lowerBoundOfXRange = x - range
        let upperBoundOfXRange = x + range

        let lowerBoundOfYRange = y - range
        let upperBoundOfYRange = y + range

        for xCoordinate in lowerBoundOfXRange...upperBoundOfXRange {
            for yCoordinate in lowerBoundOfYRange...upperBoundOfYRange{
                let coordinatePoint = Point(x: xCoordinate, y: yCoordinate)
                results.append(coordinatePoint)
            }

        }

        return results

    }
}

Answer 1 · 2017-09-02T22:39:05Z

September 2, 2017 10:39pm

This is an array that holds objects that are of a type "point"

[points]

Its contents would look like this.

var pointOne = Point(x: 2, y: 4)
var pointTwo = Point(x: 3, y: 5)
var pointThree = Point(x: 5, y: 6)

var points : [Point] = [pointOne, pointTwo, pointThree]

This is not unlike when we declare an array of objects of type "Int".

var intArray : [Int] = [1,2,3,4]

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Eddie Aguilar

Eddie Aguilar

need some clarification

1 Answer

Chris Stromberg

Chris Stromberg