The P Convention
February 24, 2013 at 02:42 PM | categories: lisp, programming |
Lispには'p'という接尾辞がつく名前の関数があるが、この'p'はpredicateのこと。
ところが、HaskellやOCamlにも'p'という接尾辞がつく関数があって、そちらはprimeの意味で使うらしい。
シングルクオート(ダッシュ)記号は英語だとprimeというので、例えばfoo'という名前の関数はfooという名前のヘルパー関数的なもの、ということになる。
ちなみに、OCamlだとシングルクオートが識別子につかえるのでfoo'という名前の関数も結構あるらしい。
まぎらわしい、かと思ったけど使う文脈が違うし意外とそうでもないか。
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