minazoko https://blog.hatena.ne.jp/minazoko/ Code Aquarium https://mnzk.hatenablog.com/ Clojure ぼくのかんがえたスレッディングマクロその２ 評価がnilになったら即抜けるsome->とsome->> (ns cool-macros (:refer-clojure :exclude [some-> some->>])) (defmacro ^:private some->* [form & exprs] (let [[e-first & exprs] exprs [e-last & exprs] (reverse exprs)] (if (nil? e-last) e-first (let [g (gensym)] `(let [~g ~e-first] ~(reduce (fn [acc… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fmnzk.hatenablog.com%2Fentry%2F2013%2F05%2F01%2F221408" title="(Clojure)短絡評価なsome-&gt;マクロ - Code Aquarium" 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 2013-05-01 22:14:08 rich https://mnzk.hatenablog.com/entry/2013/05/01/221408 1.0 100%