//
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// CLLocationArrayExtensions.swift
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// SwifterSwift
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//
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// Created by Trevor Phillips on 09/01/20.
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// Copyright © 2020 SwifterSwift
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//
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#if canImport(CoreLocation)
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import CoreLocation
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// MARK: - Methods
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public extension Array where Element: CLLocation {
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/// SwifterSwift: Calculates the sum of distances between each location in the array based on the curvature of the earth.
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///
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/// - Parameter unitLength: The unit of length to return the distance in.
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/// - Returns: The distance in the specified unit.
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@available(tvOS 10.0, macOS 10.12, watchOS 3.0, *)
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func distance(unitLength unit: UnitLength) -> Measurement<UnitLength> {
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guard count > 1 else {
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return Measurement(value: 0.0, unit: unit)
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}
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var distance = 0.0
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for idx in 0..<count-1 {
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distance += self[idx].distance(from: self[idx + 1])
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}
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return Measurement(value: distance, unit: UnitLength.meters).converted(to: unit)
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}
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}
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#endif
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