lukewakeford · January 8, 2019 14:29
diff --git a/Reduce Playground Example b/Reduce Playground Example
 import UIKit

 struct product {
    var price:Int?
    var name:String
 }

 let array = [
    product(price: 100, name: "First"),
    product(price: nil, name: "Second"),
    product(price: 300, name: "Thrid")
 ]

 let numberSum = array.reduce(0, { x, y in
    x + (y.price ?? 0)
 })

 print(numberSum)
	import UIKit

	struct product {
	var price:Int?
	var name:String
	}

	let array = [
	product(price: 100, name: "First"),
	product(price: nil, name: "Second"),
	product(price: 300, name: "Thrid")
	]

	let numberSum = array.reduce(0, { x, y in
	x + (y.price ?? 0)
	})

	print(numberSum)