Swiftのreduce便利

gistfile1.md

var evens = [Int]()
for i in 1...10 {
if i % 2 == 0 {
evens.append(i)
}
}
var evenSum = 0
for i in evens {
evenSum += i
}
println(evenSum)

evenSum = Array(1...10)
.filter { (number) in number % 2 == 0 }
.reduce(0) { (total, number) in total + number }
println(evenSum)

ともに30が返る