aereal https://blog.hatena.ne.jp/aereal/ Sexually Knowing https://this.aereal.org/ ruby x = "hoge" && puts x # -> SyntaxError y = "fuga" and puts y # -> "fuga" && は優先度が高くて、前者のコードは x = ("hoge" && puts) x と解釈されてしまう。and は優先度が低いので、後者のコードは (y = "fuga") and (puts y) と解釈される。 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fthis.aereal.org%2Fentry%2F20110318%2F1300439818" title=" and/or 演算子 - Sexually Knowing" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2011-03-18 18:16:58 rich https://this.aereal.org/entry/20110318/1300439818 1.0 100%