Swift String extension for generating filesystem paths from components

String_fromPathComponents.swift

import Foundation

extension String {
    
    /// Returns a new string made by appending to the receiver a filesystem path component.
    ///
    /// - parameter pathComponent: The path component to be appended to the receiver.
    ///
    /// - returns: A new `String` made by appending `pathComponent` to the receiver, preceded if necessary by a path separator.
    
    @warn_unused_result
    public func stringByAppendingPathComponent(pathComponent: String) -> String {
        return (self as NSString).stringByAppendingPathComponent(pathComponent)
    }
    
    /// Return a filesystem path composed of the specified components.
    /// 
    /// - parameter pathComponents: list of filesystem path components.
    ///
    /// - returns: A `String` consisting of path components with delimiters between them.
    
    public static func fromPathComponents(pathComponents: String...) -> String {
        return pathComponents.reduce("", combine: { $0.stringByAppendingPathComponent($1) })
    }
}

Example use:

let plistPath = String.fromPathComponents("/Applications/Xcode.app", "Contents", "version.plist")
// result is "/Applications/Xcode.app/Contents/version.plist"