natecook1000

/// 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

natecook1000

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

natecook1000

// Based on https://gist.github.com/dabrahams/852dfdb0b628e68567b4d97499f196f9
struct Dispatch<Model> {
  func apply<A, R>(_ a: A, _ f: (Model) -> R) -> R {
    f(a as! Model)
  }
}

protocol RandomAccessCollectionDispatch {
  func fastCount<C: Collection>(_ x: C) -> Int?
}

natecook1000

// Open-ended range operators
// 
// 100... is equivalent to 100...Int.max
// ...-100 is equivalent to Int.min...-100
// ..<3 is equivalent to Int.min..<3

import Swift

/// Conforming types provide static `max` and `min` constants.
protocol MinMaxType {

natecook1000

extension Collection {
  /// Chooses at random the given number of elements, using reservoir sampling
  /// aka Algorithm R.
  ///
  /// - Complexity: O(*n*) where *n* is the collection's count.
  func choose<T>(upTo max: Int, using generator: T) -> [Element]
    where T: RandomNumberGenerator
  {
    var i = index(startIndex, offsetBy: max, limitedBy: endIndex) ?? endIndex
    var result = self[..<i].shuffled(using: generator)

natecook1000

// (c) 2014 Nate Cook, licensed under the MIT License

/**
Returns a tuple with the closest compound fraction possible with Unicode's built-in "vulgar fractions".

See here: http://www.unicode.org/charts/PDF/U2150.pdf

:param: number The floating point number to convert.

:returns: A tuple (String, Double): the string representation of the closest possible vulgar fraction and the value of that string

natecook1000

natecook1000

/// Calls the given closure with a buffer over the given tuple's elements.
///
/// - Parameters:
///   - tuple: The tuple.
///   - elementType: The type of all of the elements in the tuple.
///   - body: The closure to execute.
///
/// - Returns: The result of `body`, if any.
func withUnsafeElementBufferPointer<Tuple, Element, Result>(
    of tuple: Tuple,

natecook1000

// The MIT License (MIT)
// 
// Copyright (c) 2014 Nate Cook
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions: