jarsen

// also see http://oleb.net/blog/2014/07/swift-strings/

// Mark: Strings

// if you want to stringByReplacingOccurrencesOfString without using a nil range, you need to convert to NSString first
var str = "some junk"
let tmpString: NSString = str
str = tmpString.stringByReplacingOccurrencesOfString(" ", withString: "+", options: nil, range: NSMakeRange(1, 6))

// find the length of a swift string

jarsen

# 1) open irb
# 2) `load "code_knight.rb"`
# 3) `knights = Marshal::load(Marshal::dump($knights))`
# 4) do the problems using your variable `knights`


# armor types - :light, :medium, :heavy
# ethical_alignment - :chaotic, :neutral, :lawful
# moral_alignment - :good, :neutral, :evil
class CodeKnight

jarsen

# TOP SECRET
# CodeNight CodeKnight Answer Key!!!

# Problem 0
# Use Enumerable.each to print out a string for each knight in the format of "Jason prefers a sword"

knights.each {|knight| puts "#{knight.name} prefers a #{knight.preferred_weapon}"}

# Problem 1
# Use Enumerable.find_all to find all knights with 50 or more health

jarsen

# example of incrementing all elements across a list
Enum.map [1,2,3], fn(x) -> x + 1 end
Enum.map [1,2,3], &1 + 1

jarsen

(module example racket
  (define (my_print str)
    (print str)))

(my_print "Hello, World!")

jarsen

defmodule Example do
  def my_puts str do
    IO.puts str
  end
end

Example.my_puts "Hello, World!"

jarsen

// old way
- (NSMutableArray *)sections {
    if (!_sections) {
        _sections = [NSMutableArray new];
    }
    return _sections;
}

// cool new way
- (NSMutableArray *)sections {

jarsen

protocol StoryboardInstantiable {
    static var storyboardName: String { get }
    static var storyboardIdentifier: String { get }
}

extension StoryboardInstantiable {
    static func instantiateFromStoryboard() -> Self {
        let storyboard = UIStoryboard(name: storyboardName, bundle: nil)
        guard let vc = storyboard.instantiateViewControllerWithIdentifier(storyboardIdentifier) as? Self else {
            fatalError("Instantiated view controller does not match type")

jarsen

func keyboardWillShow(notification: NSNotification) {
    print("Showing keyboard")
    guard let userInfo = notification.userInfo,
        rectValue = userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue,
        rawCurve = userInfo[UIKeyboardAnimationCurveUserInfoKey] as? UInt,
        duration = userInfo[UIKeyboardAnimationDurationUserInfoKey] as? Double else {
            return
    }
    
    let keyboardFrame = rectValue.CGRectValue()

jarsen

import UIKit


enum MyError: ErrorType {
    case Oooggh(String)
}

func errorProne() throws {
    throw MyError.Oooggh("nope")
}