CODEWITHSUNDEEP
iosswift
user13138159
user13138159

Reputation: 172

Find average of each ClosedRange in array of ClosedRanges

I have an array of ClosedRange Doubles as follows:

var ranges = [ClosedRange<Double>]()

Is there a swifty way to retrieve the average of each ClosedRange without having to iterate over each element in the array, and then each number in each ClosedRange?

For example, if the array is:

[ClosedRange(1...3), ClosedRange(4...5)]

I would like to retrieve: 2, 4.5

Upvotes: 0

Views: 128

Answers (1)

Leo Dabus
Leo Dabus

Reputation: 236458

You just need to coerce lower and upper bounds to Double, sum them and then divide by two:

let ranges = [1...3, 4...5]
let avgs = ranges.map {
    (Double($0.lowerBound) + Double($0.upperBound)) / 2
}
print(avgs)  // "[2.0, 4.5]\n"

If your range's bounds are already Doubles:

let ranges = [1.0...3.0, 4.0...5.0]
let avgs = ranges.map {
    ($0.lowerBound + $0.upperBound) / 2
}
print(avgs)  // "[2.0, 4.5]\n"

Upvotes: 2

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