ahcode0919

let word = "abcdefg"

//Using swift lib
String(word.characters.reverse()) //"gfedcba"

//Using char array and insert
func reverseString(wordToReverse: String) -> String {
    guard wordToReverse.characters.count > 1 else {
        return wordToReverse
    }

ahcode0919

//Anagram - Two words that contain the same characters

let testWord = "abcde"
let testWord2 = "edcba"

func isAnagram(word word: String, isAnagramOf word2: String) -> Bool {
    guard
        let word1Dictionary = countChars(word),
        let word2Dictionary = countChars(word2) else {
            return false

ahcode0919

//Playground friendly

import Foundation
/*
 The Builder Pattern helps in the creation of complex objects
 
 *Implemented with Protocols
 */

/* Before Builder Pattern is implemented */

ahcode0919

//XCode Playground Friendly

/**
 Singleton Pattern - Ensures that only one instance of a object exists in the application context
 usefull for things that will have a global context across the app.
 Ex: An internet connection, Credentials, etc.
 
 * Can only be used for reference types.
 */

ahcode0919

let dateString = "09 Aug 2016 17:53:51 -0700"
let dateFormatter = NSDateFormatter()

// Good resource for date time format syntax
//http://userguide.icu-project.org/formatparse/datetime
dateFormatter.dateFormat = "dd MMM yyyy HH:mm:ss ZZZ"

let date = dateFormatter.dateFromString(dateString) //NSDate = "Aug 09, 2016, 5:53 PM"