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}")

natecook1000

protocol StringType {
    var isEmpty: Bool { get }
}

extension String : StringType { }

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

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:

natecook1000

extension NSTimer {
    /**
    Creates and schedules a one-time `NSTimer` instance.
    
    - Parameters:
        - delay: The delay before execution.
        - handler: A closure to execute after `delay`.
    
    - Returns: The newly-created `NSTimer` instance.
    */

natecook1000

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

import Foundation

extension NSScanner {
    
    // MARK: Strings

natecook1000

// Curry Recipe

func curryRecipe(n: Int) -> String {
    let types = join(", ", map(1...n, { "T\($0)" }))
    let returnType = join(" -> ", map(1...n, { "T\($0)" }))
    let closures = join(" in ", map(1...n, { "{ t\($0)" }))
    let braces = join(" ", Array(count: n, repeatedValue: "}"))
    return "func curry<\(types), R>(f: (\(types)) -> R) -> \(returnType) -> R {\r" +
        "    return \(closures) in f(\(types.lowercaseString)) \(braces)\r}"
}

natecook1000

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

natecook1000

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)