[Elixir] guard構文徹底攻略 - Qiitaやりたいこと パターンマッチをバキバキに仕上げてくれるのが、whenから始まるguard構文。標準で様々な演算子と関数が使えるようになっている。やや量が多いので、しっかりと使いこなせるようにするため汎用性の高そうなguardを一通り書いてみた。 演算子 演算子は以下のものが利用可能。詳細はこちら参照 defmodule Demo.GuardTest do use Demo.ConnCase def this_is(x) when is_nil(x), do: "This is nil" def this_is(x) when is_atom(x), do: "This is Atom" def this_is(x) when is_binary(x), do: "This is Binary" def this_is(x) when is_bitstring(x), do: "This i
![[Elixir] guard構文徹底攻略 - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/bf93b03f2009199c9327078f5ae62152f40afa30/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fqiita-user-contents.imgix.net%252Fhttps%25253A%25252F%25252Fcdn.qiita.com%25252Fassets%25252Fpublic%25252Farticle-ogp-background-afbab5eb44e0b055cce1258705637a91.png%253Fixlib%253Drb-4.0.0%2526w%253D1200%2526blend64%253DaHR0cHM6Ly9xaWl0YS11c2VyLXByb2ZpbGUtaW1hZ2VzLmltZ2l4Lm5ldC9odHRwcyUzQSUyRiUyRnFpaXRhLWltYWdlLXN0b3JlLnMzLmFtYXpvbmF3cy5jb20lMkYwJTJGNTY0NCUyRnByb2ZpbGUtaW1hZ2VzJTJGMTQ3MzY4MjE2MT9peGxpYj1yYi00LjAuMCZhcj0xJTNBMSZmaXQ9Y3JvcCZtYXNrPWVsbGlwc2UmZm09cG5nMzImcz01YjRjNmNlYzdlMzQ2Njg1OWI3NGVmYjZmMjc4NWJlMg%2526blend-x%253D120%2526blend-y%253D467%2526blend-w%253D82%2526blend-h%253D82%2526blend-mode%253Dnormal%2526s%253D1875469e12d646b293317dcd5ed54352%3Fixlib%3Drb-4.0.0%26w%3D1200%26fm%3Djpg%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTk2MCZoPTMyNCZ0eHQ9JTVCRWxpeGlyJTVEJTIwZ3VhcmQlRTYlQTclOEIlRTYlOTYlODclRTUlQkUlQjklRTUlQkElOTUlRTYlOTQlQkIlRTclOTUlQTUmdHh0LWFsaWduPWxlZnQlMkN0b3AmdHh0LWNvbG9yPSUyMzFFMjEyMSZ0eHQtZm9udD1IaXJhZ2lubyUyMFNhbnMlMjBXNiZ0eHQtc2l6ZT01NiZ0eHQtcGFkPTAmcz1iOGJiYmNlYmNjZjg1MTM4MDExMzEzOGE5MGYzMTBhMA%26mark-x%3D120%26mark-y%3D112%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTgzOCZoPTU4JnR4dD0lNDBGTDRUTGlOMyZ0eHQtY29sb3I9JTIzMUUyMTIxJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTM2JnR4dC1wYWQ9MCZzPWRiM2I4MDM2NmNmY2ZiMzQ0YzE0OTc1MjIyMmMxZWQ1%26blend-x%3D242%26blend-y%3D480%26blend-w%3D838%26blend-h%3D46%26blend-fit%3Dcrop%26blend-crop%3Dleft%252Cbottom%26blend-mode%3Dnormal%26s%3D78cada67d27924bd4ec81030eb031783)
