natecook1000

import Foundation

extension UnicodeScalar : ForwardIndexType {
    public func successor() -> UnicodeScalar {
        return UnicodeScalar(value + 1)
    }
}

var operatorHeads: [UnicodeScalar] = Array("=-+!*%<>&|^~?".unicodeScalars)
operatorHeads += Array("\u{00A1}" ... "\u{00A7}")

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protocol StringType {
    var isEmpty: Bool { get }
}

extension String : StringType { }

extension Optional where Wrapped: StringType {
    var isNullOrEmpty: Bool {
        return self?.isEmpty ?? true
    }

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extension String.StringInterpolation {
    mutating func appendInterpolation<T>(_ value: T?, default: @autoclosure () -> String) {
        self.appendLiteral(value.map(String.init(describing:)) ?? `default`())
    }
}

let num = Int("21")
print("The number is: \(num, default: "<invalid>")")
// The number is: 21

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extension String {
    var isHomogeneous: Bool {
        if let firstChar = characters.first {
            for char in dropFirst(characters) where char != firstChar {
                return false
            }
        }
        return true
    }
}

natecook1000

// integerWithBytes.swift
// as seen in http://natecook.com/blog/2015/03/a-sanatorium-for-swift-generics/
//
// (c) 2015 Nate Cook, licensed under the MIT license

protocol BitshiftOperationsType {
    func <<(lhs: Self, rhs: Self) -> Self
    func >>(lhs: Self, rhs: Self) -> Self
    func <<=(inout lhs: Self, rhs: Self)
    func >>=(inout lhs: Self, rhs: Self)

natecook1000

// NSCalendar+Swift.swift
// A set of Swift-idiomatic methods for NSCalendar
//
// (c) 2015 Nate Cook, licensed under the MIT license

extension NSCalendar {
    /// Returns the hour, minute, second, and nanoseconds of a given date.
    func getTimeFromDate(date: NSDate) -> (hour: Int, minute: Int, second: Int, nanosecond: Int) {
        var (hour, minute, second, nanosecond) = (0, 0, 0, 0)
        getHour(&hour, minute: &minute, second: &second, nanosecond: &nanosecond, fromDate: date)

natecook1000

// CalculatorView.swift		
// as seen in http://nshipster.com/ibinspectable-ibdesignable/		
//		
// (c) 2015 Nate Cook, licensed under the MIT license		

/// The alignment for drawing an String inside a bounding rectangle.
enum NCStringAlignment {
    case LeftTop
    case CenterTop
    case RightTop

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/// This is a useful index that can store a comparable element or the end of
/// a collection. Similar to https://github.com/apple/swift/pull/15193
enum IndexWithEnd<T : Comparable> : Comparable {
  case element(T)
  case end
  
  static func < (lhs: IndexWithEnd, rhs: IndexWithEnd) -> Bool {
    switch (lhs, rhs) {
    case (.element(let l), .element(let r)):
      return l < r

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struct Transposition<Base: Collection>: RandomAccessCollection
  where Base.Element: RandomAccessCollection
{
  typealias Index = Int
  typealias Indices = Range<Int>
  
  var base: Base
  
  struct Transposed: Collection {
    typealias Index = Base.Index

natecook1000

The following table lists the Unicode properties as described here, along with the corresponding Unicode.Scalar.Properties property and type, if implemented.

Unicode Property	Unicode.Scalar.Properties	Type
General
Name	name	String?
Name_Alias	nameAlias	String?
Block
Age	age	`Unicode.Versi