memfrag

#import <UIKit/UIKit.h>

// IB_DESIGNABLE means that the view will be
// rendered live in Interface Builder.

IB_DESIGNABLE
@interface MJPlaceholderView : UIView

// IBInspectable means that the property

memfrag

let values: [UInt] = [4, 8, 15, 16, 23, 42]
 
let biggestValue = values.reduce(0, {$1 > $0 ? $1 : $0})

// biggestValue is now 42

memfrag

let values = [4, 8, 15, 16, 23, 42]

let meanValue = values.reduce(0, +) / values.count

// + is a operator function and we can pass it in to reduce as the function parameter.

memfrag

operator infix <=> {}
infix func <=> <T>(inout left: T, inout right: T) {
  let tmp = left
  left = right
  right = tmp
}

var a = 1337
var b = 4711

memfrag

operator postfix ** {}
postfix func ** (value: Int) -> Int {
  return value * value
}
 
let a = 3** + 1
// a now contains 10

memfrag

operator infix <- {}
 
infix func <- <T>(inout left: T, right: T) {
  left = right
}
 
var value = 0 // Initialize
 
value <- 1337
// value now contains 1337