hollance

extension String {
  subscript(i: Int) -> Character {
    return Array(self)[i]
  }
}

var s = "Hello world"
println(s[0])

hollance

class Set<T: Hashable>: Sequence, Printable {
  var dictionary = Dictionary<T, Bool>()  // private

  func addElement(newElement: T) {
    dictionary[newElement] = true
  }

  func removeElement(element: T) {
    dictionary[element] = nil
  }

hollance

import Foundation
import CoreGraphics

@infix func * (left: CGPoint, right: (a: CGFloat, b: CGFloat)) -> CGPoint {
  return CGPoint(x: left.x * right.a, y: left.y * right.b)
}

let pt1 = CGPointMake(100, 50)
let pt2 = pt1 * (2, 3)

hollance

/*
 The code from https://gist.github.com/GarthSnyder/c8efe80675cd00322b51
 rewritten as a Swift sequence and generator.
 */

import Foundation
 
struct PrimeFactorGenerator: GeneratorType {
  var n: Int
  var divisor = 2

hollance

struct TakeWhile<S: SequenceType>: SequenceType {
  private let seq: S
  private let block: (S.Generator.Element) -> Bool
  init(_ seq: S, block: (S.Generator.Element) -> Bool) {
    self.seq = seq
    self.block = block
  }
  func generate() -> GeneratorOf<S.Generator.Element> {
    var gen = seq.generate()
    return GeneratorOf<S.Generator.Element> {

hollance

var rect = CGRect(x: 100, y: 10, width: 205, height: 10000)
addressLabel.frame = rect
addressLabel.sizeToFit()

rect.size.height = addressLabel.frame.size.height
addressLabel.frame = rect

hollance

//
//  NSArray-Blocks.h
//  Handy codebits
//
//  If you want to keep block definitions terse, simple and dynamic, have no
//  problems with the incompatible block pointer types and you don't mind
//  compiler warnings about sending a message without matching signature,
//  DO NOT IMPORT THIS FILE, seriously.
//
//  Created by Sijawusz Pur Rahnama on 15/11/09.

hollance

@implementation UIView (MHExtensions)

+ (id)mh_viewFromNibNamed:(NSString *)nibName owner:(id)ownerOrNil
{
	NSArray *nib = [[NSBundle mainBundle] loadNibNamed:nibName owner:ownerOrNil options:nil];
	for (id object in nib)
	{
		if ([object isKindOfClass:[self class]])
			return object;
	}

hollance

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^
{
	// do stuff here

	dispatch_async(dispatch_get_main_queue(), ^
	{
		// do stuff on main thread
	});
});

hollance

- (CGImageRef)createMaskFromAlphaChannel:(UIImage *)image
{
	size_t width = image.size.width;
	size_t height = image.size.height; 

	NSMutableData *data = [NSMutableData dataWithLength:width*height];

	CGContextRef context = CGBitmapContextCreate(
		[data mutableBytes], width, height, 8, width, NULL, kCGImageAlphaOnly);