を実装してみました。 https://github.com/dankogai/swift-lazylist 過去にも Perl http://blog.livedoor.jp/dankogai/archives/50839189.html JavaScript https://github.com/dankogai/js-list-lazy などでも実装していて、我ながらどれだけ Lazy List が好きなんだと思いますが、 Swiftのそれは格別に気持ちいいです。 以下、READMEから。 Infinite list let ns = lazylist { $0 } // infinite list of natural numbers println(ns.filter{$0 % 2 == 1}.map{$0 * $0}.take(10)) // [1, 9, 25, 49, 81,
![Swiftで無限リスト - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/6ce52ddcd7aa18799c8b4dc26a8ee17be43174a7/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Farticle-ogp-background-412672c5f0600ab9a64263b751f1bc81.png%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTk3MiZoPTM3OCZ0eHQ9U3dpZnQlRTMlODElQTclRTclODQlQTElRTklOTklOTAlRTMlODMlQUElRTMlODIlQjklRTMlODMlODgmdHh0LWFsaWduPWxlZnQlMkN0b3AmdHh0LWNvbG9yPSUyMzIxMjEyMSZ0eHQtZm9udD1IaXJhZ2lubyUyMFNhbnMlMjBXNiZ0eHQtc2l6ZT01NiZzPTdiODU0YTA2NjUwOGYxZWNiYjc1MzEzMmNlYmVhOTAy%26mark-x%3D142%26mark-y%3D57%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZoPTc2Jnc9NzcwJnR4dD0lNDBkYW5rb2dhaSZ0eHQtY29sb3I9JTIzMjEyMTIxJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTM2JnR4dC1hbGlnbj1sZWZ0JTJDdG9wJnM9NWUxNTk1MThmMjRkZTVlYjY4ZGU2MDY4OTcyMGMxNmE%26blend-x%3D142%26blend-y%3D486%26blend-mode%3Dnormal%26s%3Dd63fa470013cfbe6e7093263d7c0304b)