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Swiftでfor文を使わないで書く

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この記事が話題になっていたのでSwiftでのサンプルコードを示します。


問題: 0から100未満の偶数の和を求めよ。

for文を使った解答
var t = 0
for i in 0..<100 {
    if i % 2 == 0 {
        t += i
    }
}
print(t) // 2450
関数型を使った解答
print((0..<100).filter { $0 % 2 == 0 }.reduce(0, +)) // 2450

自分としては、map, filter, reduceあたりを使って簡潔に関数型で書けるなら、for文は使わない方が良いと思うので上記の記事に賛成です。

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