alexito4

// Understanding Value and Reference Types in Swift
/*
One of the coolest parts about Swift is how powerful all the types are. Structs are not like basic C structs, they have a lot of similarities with classes, and the same goes for the Enums. This is really good but also comes with the risk that newcomers doesn't know the differences between them. The oficial Swift blog has a great post about [Value and Reference Types](https://developer.apple.com/swift/blog/?id=10), read it.

In this post/playground I want to go step by step in some cases that will help newcomers understand how the different types work in Swift. It's good for people that comes form Objective-C to understand how Swift still has pointers, but hidden behind the language to make it safe. And for the newcomers, that doesn't know much about programming or *pointers*, will be good to understand what's actually happening behind the scenes.

## Categorization

Swift has two categories of Types: Value and Reference.

alexito4

local wait = 60

os.loadAPI("weather")
local city = "London,uk"

while true do
  local commandBlock = peripheral.wrap("back")

  local w = weather.getWeather(city)

alexito4

#import <Foundation/Foundation.h>
#import "Smiler.h"

@interface Amazing : NSObject <Smiler>

@end

alexito4

require 'nokogiri-plist'
require 'uri'

class SRLItem
	attr_accessor :title
	attr_accessor :url
	
	attr_accessor :source
	
	def initialize(dict)

alexito4

protocol Stack {
    typealias Element
    
    mutating func push(value: Element)
    mutating func pop() -> Element?
}

struct ArrayStack<T>: Stack {
....

alexito4

Keybase proof

I hereby claim:

• I am alexito4 on github.
• I am alejandromp (https://keybase.io/alejandromp) on keybase.
• I have a public key whose fingerprint is F281 C10D C3E7 50B6 E256 ABCC DB9D C4B2 043A 15C9

To claim this, I am signing this object:

alexito4

What's New in Swift
Creating Apps for a Global Audience
Introducing Podcast Analytics
What's New in Cocoa Touch
Using Accelerate and simd
Live Screen Broadcast with ReplayKit
I Have This Idea For An App...
Automatic Strong Passwords and Security Code AutoFill 
Measuring and Optimizing HLS Performance
What’s New in ARKit 2

alexito4

#!/usr/bin/swift sh

import Foundation

guard let path = CommandLine.arguments.dropFirst().first else { exit(1) }

print(path)

let content = try! String(contentsOfFile: path)
let lines = content

alexito4

import SwiftUI
import Combine
import AlamofireImage

let imageDownloader = ImageDownloader(
    configuration: ImageDownloader.defaultURLSessionConfiguration(),
    downloadPrioritization: .fifo,
    maximumActiveDownloads: 4,
    imageCache: AutoPurgingImageCache()
)

alexito4

for (const checkbox of document.querySelectorAll('.js-reviewed-checkbox')) {
    if (checkbox.attributes["data-ga-click"].value.includes("value:false")) {
        checkbox.click();
    }
}