Sequence+KeyPath.swift

extension Sequence {
    
    public func sortedAscending<T: Comparable>(by keyPath: KeyPath<Element, T>) -> [Element] {
        sorted(by: keyPath, comparator: <)
    }
    
    public func sortedDescending<T: Comparable>(by keyPath: KeyPath<Element, T>) -> [Element] {
        sorted(by: keyPath, comparator: >)
    }
    
    public func sorted<T: Comparable>(by keyPath: KeyPath<Element, T>, comparator: (T, T) -> Bool) -> [Element] {
        sorted { comparator($0[keyPath: keyPath], $1[keyPath: keyPath]) }
    }
}


extension Array {
    
    @inlinable public mutating func sortedAscending<T: Comparable>(by keyPath: KeyPath<Element, T>) {
        sort(by: keyPath, comparator: <)
    }
    
    @inlinable public mutating func sortedDescending<T: Comparable>(by keyPath: KeyPath<Element, T>) {
        sort(by: keyPath, comparator: >)
    }
    
    @inlinable public mutating func sort<T: Comparable>(by keyPath: KeyPath<Element, T>, comparator: (T, T) -> Bool) {
        sort { comparator($0[keyPath: keyPath], $1[keyPath: keyPath]) }
    }
}