ElixirでStreamではないものをStream化するイディオムというものを書いた. Ruby でも同じことができるだろうか. 単に 5 つ値を取ってみると,全て同じ時刻になってしまう. Enumerator.new { |y| loop { y << Time.now } } .lazy .map { |e| puts e; e } .first(5) #> 2015-08-06 12:03:13 +0900 #> 2015-08-06 12:03:13 +0900 #> 2015-08-06 12:03:13 +0900 #> 2015-08-06 12:03:13 +0900 #> 2015-08-06 12:03:13 +0900 # => [2015-08-06 12:03:13 +0900, 2015-08-06 12:03:13 +0900, 2015-08-06 12:
![1秒毎に処理をするEnumerator - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/44482796d5b1e03ead9eadebc43279cd30e4694a/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-9f5428127621718a910c8b63951390ad.png%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTkxNiZoPTMzNiZ0eHQ9MSVFNyVBNyU5MiVFNiVBRiU4RSVFMyU4MSVBQiVFNSU4NyVBNiVFNyU5MCU4NiVFMyU4MiU5MiVFMyU4MSU5OSVFMyU4MiU4QkVudW1lcmF0b3ImdHh0LWNvbG9yPSUyMzIxMjEyMSZ0eHQtZm9udD1IaXJhZ2lubyUyMFNhbnMlMjBXNiZ0eHQtc2l6ZT01NiZ0eHQtY2xpcD1lbGxpcHNpcyZ0eHQtYWxpZ249bGVmdCUyQ3RvcCZzPTNhOTIxMWMzM2I5NTMxMDBmMjQxMzZkMTc4YjE5Y2E5%26mark-x%3D142%26mark-y%3D112%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTYxNiZ0eHQ9JTQwbmlrdSZ0eHQtY29sb3I9JTIzMjEyMTIxJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTM2JnR4dC1hbGlnbj1sZWZ0JTJDdG9wJnM9MDM2NThmNmE2OWM5ZDJjZDM5MjI5MTQzYTQxNTNiMjk%26blend-x%3D142%26blend-y%3D491%26blend-mode%3Dnormal%26s%3D657f7a278c4e932c8a29093ef948a9ce)