thedeagler

// Originally found at: http://www.fogcreek.com/jobs/dev/
/*
========================================
    Prompt
========================================
 */
// Find a 9 letter string of characters that contains only the letters
var values = 'acdegilmnoprstuw';

// such that badHash(the_string) is

thedeagler

extension Array where Element: Collection {
    typealias InnerElement = Element.Element

    /// Rotates a 2d array clockwise such that the nth column becomes the nth row. Rows which have
    /// fewer elements than the longest row will be padded with nil to make a full, rectangular
    /// matrix prior to rotation
    ///
    /// - Returns: A rectangular matrix where the contents are rotated 90 degrees clockwise. Nil is
    ///            used as padding for rows/columns with fewer eleemnts than the max.
    func rotatedClockwise() -> [[InnerElement?]] {