alexito4

#import <Foundation/Foundation.h>

// typedef
typedef NSString*(^ConvertBlock)(NSString *text);

@interface Thing : NSObject
@property (nonatomic, strong) void (^coolPropertyBlock)(NSString *text); // Property

// method param
- (void)doSomething:(void(^)(NSString *text))block with:(NSString *)person;

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

/*
If you want to use blocks the only method that works is:
setImageWithURLRequest:placeholderImage:success:failure:

But you don't want to use URLRequest!
*/
// .h

- (void)setImageWithURL:(NSURL *)url
       placeholderImage:(UIImage *)placeholderImage

alexito4

#!/bin/sh

while :
do

./querydb.sh
sleep 2

done

alexito4

// UIViewController+ModalCheck.h
//
// Created by Felipe Sabino on 06/14/11

#import <UIKit/UIKit.h>

@interface UIViewController (ModalCheck)

-(BOOL)isPresentedAsModal;

alexito4

embed, iframe, object { max-width: 100%; }