derwind https://blog.hatena.ne.jp/derwind/ らんだむな記憶 https://randommemory.hatenablog.com/ Haskell/Scala Starting Out - Learn You a Haskell for Great Good! ghci> zip [1..] ["apple", "orange", "cherry", "mango"] [(1,"apple"),(2,"orange"),(3,"cherry"),(4,"mango")] ふむ。 Prelude> zip [1..3] [2..5] [(1,2),(2,3),(3,4)] 確かにっ！！ では、 Prelude> zip [1..] [2..] これは無事死亡。遅延評価なので実質何も起こらないのかな？と思ったが、ghci が即時に評価結果を出そうとしてく… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Frandommemory.hatenablog.com%2Fentry%2F2016%2F01%2F17%2F155626" title="はぢめてのHaskell(7) - らんだむな記憶" 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 2016-01-17 15:56:26 rich https://randommemory.hatenablog.com/entry/2016/01/17/155626 1.0 100%