nicklockwood

Thoughts on Swift 2 Errors

When Swift was first announced, I was gratified to see that one of the (few) philosophies that it shared with Objective-C was that exceptions should not be used for control flow, only for highlighting fatal programming errors at development time.

So it came as a surprise to me when Swift 2 brought (What appeared to be) traditional exception handling to the language.

Similarly surprised were the functional Swift programmers, who had put their faith in the Haskell-style approach to error handling, where every function returns an enum (or monad, if you like) containing either a valid result or an error. This seemed like a natural fit for Swift, so why did Apple instead opt for a solution originally designed for clumsy imperative languages?

I'm going to cover three things in this post:

patricklynch

//  The 6 ways to uwnrap optionals in Swift 2.0
//
//  Created by Patrick Lynch on 6/28/15.
//  Copyright © 2015 Patrick Lynch. All rights reserved.

import Foundation

// 1. Force Unwrapping
// 2. Optional Binding
// 3. Optional Chaining

marteinn

randomsequence

//: Playground - noun: a place where people can play

import Cocoa

let bounds = CGRectMake(0, 0, 100, 100);

func DrawImageInCGContext(#size: CGSize, #drawFunc: (context: CGContextRef) -> ()) -> NSImage {
    let colorSpace = CGColorSpaceCreateDeviceRGB()
    let bitmapInfo = CGBitmapInfo(CGImageAlphaInfo.PremultipliedLast.rawValue)
    let context = CGBitmapContextCreate(

steipete

#!/bin/bash

# This script downlaods and builds the iOS and Mac openSSL libraries with Bitcode enabled

# Credits:
# https://github.com/st3fan/ios-openssl
# https://github.com/x2on/OpenSSL-for-iPhone/blob/master/build-libssl.sh
# Peter Steinberger, PSPDFKit GmbH, @steipete.

set -e

githubutilities

Apple Real Devices Debugging

What you need

• certificate--which tells your devices that Apple trust you
• a app id
• a test device
• a provisioning profile

felix-schwarz

#!/bin/bash

# This script downloads and builds the iOS, tvOS and Mac openSSL libraries with Bitcode enabled

# Credits:
# https://github.com/st3fan/ios-openssl
# https://github.com/x2on/OpenSSL-for-iPhone/blob/master/build-libssl.sh
# https://gist.github.com/foozmeat/5154962
# Peter Steinberger, PSPDFKit GmbH, @steipete.
# Felix Schwarz, IOSPIRIT GmbH, @felix_schwarz.

nrollr

Install MySQL on OS X El Capitan

Normally the installation of MySQL can be achieved with a single command, which executes a script provided by MacMiniVault : bash <(curl -Ls http://git.io/eUx7rg)

However, at the time of writing the script is not compatible with OS X El Capitan (10.11)

Install MySQL using Homebrew

An alternative to the aforementioned installation script is installing MySQL using Homebrew. This gist assumes you already have Homebrew installed, if not first read the article "Homebrew and El Capitan"

Make sure Homebrew has the latest formulae, so run brew update first

mayoff

import UIKit

class FloatingButtonController: UIViewController {

    private(set) var button: UIButton!

    required init?(coder aDecoder: NSCoder) {
        fatalError()
    }

teknologika

//
//  GPX.swift
//  Trax
//
//  Created by CS193p Instructor.
//  Copyright (c) 2015 Stanford University. All rights reserved.
//
//  Very simple GPX file parser.
//  Only verified to work for CS193p demo purposes!